diff --git a/.k4fwcore-ci.d/compile_and_test.sh b/.k4fwcore-ci.d/compile_and_test.sh
index bd7dc56d..8e863c23 100644
--- a/.k4fwcore-ci.d/compile_and_test.sh
+++ b/.k4fwcore-ci.d/compile_and_test.sh
@@ -1,3 +1,21 @@
+##
+## Copyright (c) 2014-2023 Key4hep-Project.
+##
+## This file is part of Key4hep.
+## See https://key4hep.github.io/key4hep-doc/ for further info.
+##
+## Licensed under the Apache License, Version 2.0 (the "License");
+## you may not use this file except in compliance with the License.
+## You may obtain a copy of the License at
+##
+##     http://www.apache.org/licenses/LICENSE-2.0
+##
+## Unless required by applicable law or agreed to in writing, software
+## distributed under the License is distributed on an "AS IS" BASIS,
+## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+## See the License for the specific language governing permissions and
+## limitations under the License.
+##
 mkdir build
 cd build
 git clone --depth 1 https://github.com/key4hep/spack
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 658df22a..af806c4e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,21 @@
+#[[
+Copyright (c) 2014-2023 Key4hep-Project.
+
+This file is part of Key4hep.
+See https://key4hep.github.io/key4hep-doc/ for further info.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+]]
 CMAKE_MINIMUM_REQUIRED(VERSION 3.15)
 
 project(k4FWCore)
diff --git a/doc/uniqueIDGen.md b/doc/uniqueIDGen.md
index 7b478d33..9ba537f6 100644
--- a/doc/uniqueIDGen.md
+++ b/doc/uniqueIDGen.md
@@ -1,3 +1,21 @@
+<!--
+Copyright (c) 2014-2023 Key4hep-Project.
+
+This file is part of Key4hep.
+See https://key4hep.github.io/key4hep-doc/ for further info.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
 # How to use UniqueIDGenSvc
 
 A Service to generate unique identifiers can be used with the following inputs:
diff --git a/k4FWCore/CMakeLists.txt b/k4FWCore/CMakeLists.txt
index 82e855c1..00a8d07b 100644
--- a/k4FWCore/CMakeLists.txt
+++ b/k4FWCore/CMakeLists.txt
@@ -1,3 +1,22 @@
+#[[
+Copyright (c) 2014-2023 Key4hep-Project.
+
+This file is part of Key4hep.
+See https://key4hep.github.io/key4hep-doc/ for further info.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+]]
+
 ################################################################################
 # Package: k4FWCore
 ################################################################################
diff --git a/k4FWCore/components/FCCDataSvc.cpp b/k4FWCore/components/FCCDataSvc.cpp
index 353dc227..275a780e 100644
--- a/k4FWCore/components/FCCDataSvc.cpp
+++ b/k4FWCore/components/FCCDataSvc.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 #include "FCCDataSvc.h"
 
diff --git a/k4FWCore/components/FCCDataSvc.h b/k4FWCore/components/FCCDataSvc.h
index 107d3c4f..4941e9e2 100644
--- a/k4FWCore/components/FCCDataSvc.h
+++ b/k4FWCore/components/FCCDataSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 #ifndef K4FWCORE_FCCDATASVC_H
 #define K4FWCORE_FCCDATASVC_H
diff --git a/k4FWCore/components/PodioInput.cpp b/k4FWCore/components/PodioInput.cpp
index ced86fdd..b58bc0ec 100644
--- a/k4FWCore/components/PodioInput.cpp
+++ b/k4FWCore/components/PodioInput.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "PodioInput.h"
 
 #include "TFile.h"
diff --git a/k4FWCore/components/PodioInput.h b/k4FWCore/components/PodioInput.h
index 3bb31433..4f61caa8 100644
--- a/k4FWCore/components/PodioInput.h
+++ b/k4FWCore/components/PodioInput.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef FWCORE_PODIOINPUT_H
 #define FWCORE_PODIOINPUT_H
 // Gaaudi
diff --git a/k4FWCore/components/PodioLegacyInput.cpp b/k4FWCore/components/PodioLegacyInput.cpp
index e905431d..21f4eea9 100644
--- a/k4FWCore/components/PodioLegacyInput.cpp
+++ b/k4FWCore/components/PodioLegacyInput.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "PodioLegacyInput.h"
 
 #include "TFile.h"
diff --git a/k4FWCore/components/PodioLegacyInput.h b/k4FWCore/components/PodioLegacyInput.h
index 58907418..6083fac9 100644
--- a/k4FWCore/components/PodioLegacyInput.h
+++ b/k4FWCore/components/PodioLegacyInput.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef FWCORE_PODIOLEGACYINPUT_H
 #define FWCORE_PODIOLEGACYINPUT_H
 // Gaaudi
diff --git a/k4FWCore/components/PodioLegacyOutput.cpp b/k4FWCore/components/PodioLegacyOutput.cpp
index fcbb5c0f..f3370dfb 100644
--- a/k4FWCore/components/PodioLegacyOutput.cpp
+++ b/k4FWCore/components/PodioLegacyOutput.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include <cstdlib>
 
 #include "PodioLegacyOutput.h"
diff --git a/k4FWCore/components/PodioLegacyOutput.h b/k4FWCore/components/PodioLegacyOutput.h
index 80173dda..f1587655 100644
--- a/k4FWCore/components/PodioLegacyOutput.h
+++ b/k4FWCore/components/PodioLegacyOutput.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef FWCORE_PODIOLEGACYOUTPUT_H
 #define FWCORE_PODIOLEGACYOUTPUT_H
 
diff --git a/k4FWCore/components/PodioOutput.cpp b/k4FWCore/components/PodioOutput.cpp
index 8c297013..ec7b1634 100644
--- a/k4FWCore/components/PodioOutput.cpp
+++ b/k4FWCore/components/PodioOutput.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include <cstdlib>
 
 #include "PodioOutput.h"
diff --git a/k4FWCore/components/PodioOutput.h b/k4FWCore/components/PodioOutput.h
index f4f46ba3..4fa62c2b 100644
--- a/k4FWCore/components/PodioOutput.h
+++ b/k4FWCore/components/PodioOutput.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef FWCORE_PODIOOUTPUT_H
 #define FWCORE_PODIOOUTPUT_H
 
diff --git a/k4FWCore/components/UniqueIDGenSvc.cpp b/k4FWCore/components/UniqueIDGenSvc.cpp
index 3b8b42b1..591feb27 100644
--- a/k4FWCore/components/UniqueIDGenSvc.cpp
+++ b/k4FWCore/components/UniqueIDGenSvc.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "UniqueIDGenSvc.h"
 
 DECLARE_COMPONENT(UniqueIDGenSvc)
diff --git a/k4FWCore/components/UniqueIDGenSvc.h b/k4FWCore/components/UniqueIDGenSvc.h
index bfd141c3..a3354152 100644
--- a/k4FWCore/components/UniqueIDGenSvc.h
+++ b/k4FWCore/components/UniqueIDGenSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef FWCORE_UNIQUEIDGENSVC_H
 #define FWCORE_UNIQUEIDGENSVC_H
 
diff --git a/k4FWCore/components/k4DataSvc.cpp b/k4FWCore/components/k4DataSvc.cpp
index 139f1e07..380634a3 100644
--- a/k4FWCore/components/k4DataSvc.cpp
+++ b/k4FWCore/components/k4DataSvc.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 #include "k4DataSvc.h"
 
diff --git a/k4FWCore/components/k4DataSvc.h b/k4FWCore/components/k4DataSvc.h
index 128de926..4be2c04b 100644
--- a/k4FWCore/components/k4DataSvc.h
+++ b/k4FWCore/components/k4DataSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 #ifndef K4FWCORE_K4DATASVC_H
 #define K4FWCORE_K4DATASVC_H
diff --git a/k4FWCore/components/k4LegacyDataSvc.cpp b/k4FWCore/components/k4LegacyDataSvc.cpp
index 8c33416b..eb123ac2 100644
--- a/k4FWCore/components/k4LegacyDataSvc.cpp
+++ b/k4FWCore/components/k4LegacyDataSvc.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 #include "k4LegacyDataSvc.h"
 
diff --git a/k4FWCore/components/k4LegacyDataSvc.h b/k4FWCore/components/k4LegacyDataSvc.h
index 63018001..b40dc6f5 100644
--- a/k4FWCore/components/k4LegacyDataSvc.h
+++ b/k4FWCore/components/k4LegacyDataSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 #ifndef K4FWCORE_K4LEGACYDATASVC_H
 #define K4FWCORE_K4LEGACYDATASVC_H
diff --git a/k4FWCore/components/rootUtils.h b/k4FWCore/components/rootUtils.h
index 85b5ef76..c8bc187d 100644
--- a/k4FWCore/components/rootUtils.h
+++ b/k4FWCore/components/rootUtils.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef PODIO_ROOT_UTILS_H
 #define PODIO_ROOT_UTILS_H
 
diff --git a/k4FWCore/include/k4FWCore/DataHandle.h b/k4FWCore/include/k4FWCore/DataHandle.h
index 5871efc0..bc308d3b 100644
--- a/k4FWCore/include/k4FWCore/DataHandle.h
+++ b/k4FWCore/include/k4FWCore/DataHandle.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef K4FWCORE_DATAHANDLE_H
 #define K4FWCORE_DATAHANDLE_H
 
diff --git a/k4FWCore/include/k4FWCore/DataWrapper.h b/k4FWCore/include/k4FWCore/DataWrapper.h
index dfd68907..b172c058 100644
--- a/k4FWCore/include/k4FWCore/DataWrapper.h
+++ b/k4FWCore/include/k4FWCore/DataWrapper.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef K4FWCORE_DATAWRAPPER_H
 #define K4FWCORE_DATAWRAPPER_H
 
diff --git a/k4FWCore/include/k4FWCore/KeepDropSwitch.h b/k4FWCore/include/k4FWCore/KeepDropSwitch.h
index ba099f96..a88b9683 100644
--- a/k4FWCore/include/k4FWCore/KeepDropSwitch.h
+++ b/k4FWCore/include/k4FWCore/KeepDropSwitch.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef EXAMPLES_KEEPDROPSWITCH_H
 #define EXAMPLES_KEEPDROPSWITCH_H
 
diff --git a/k4FWCore/include/k4FWCore/MetaDataHandle.h b/k4FWCore/include/k4FWCore/MetaDataHandle.h
index 1bc625b4..fc1a3af7 100644
--- a/k4FWCore/include/k4FWCore/MetaDataHandle.h
+++ b/k4FWCore/include/k4FWCore/MetaDataHandle.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef K4FWCORE_METADATAHANDLE_H
 #define K4FWCORE_METADATAHANDLE_H
 
diff --git a/k4FWCore/include/k4FWCore/PodioDataSvc.h b/k4FWCore/include/k4FWCore/PodioDataSvc.h
index 3b8011a4..7c078b73 100644
--- a/k4FWCore/include/k4FWCore/PodioDataSvc.h
+++ b/k4FWCore/include/k4FWCore/PodioDataSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef FWCORE_PODIODATASVC_H
 #define FWCORE_PODIODATASVC_H
 
diff --git a/k4FWCore/include/k4FWCore/PodioLegacyDataSvc.h b/k4FWCore/include/k4FWCore/PodioLegacyDataSvc.h
index 6b2f6f79..fe4052d7 100644
--- a/k4FWCore/include/k4FWCore/PodioLegacyDataSvc.h
+++ b/k4FWCore/include/k4FWCore/PodioLegacyDataSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef FWCORE_PODIOLEGACYDATASVC_H
 #define FWCORE_PODIOLEGACYDATASVC_H
 
diff --git a/k4FWCore/python/k4FWCore/parseArgs.py b/k4FWCore/python/k4FWCore/parseArgs.py
index bdba4f76..ff5972f0 100644
--- a/k4FWCore/python/k4FWCore/parseArgs.py
+++ b/k4FWCore/python/k4FWCore/parseArgs.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 import argparse
 
 parser = argparse.ArgumentParser(description="Run job in the Key4HEP framework", add_help=False)
\ No newline at end of file
diff --git a/k4FWCore/src/KeepDropSwitch.cpp b/k4FWCore/src/KeepDropSwitch.cpp
index 2a816d6d..b8d2eedd 100644
--- a/k4FWCore/src/KeepDropSwitch.cpp
+++ b/k4FWCore/src/KeepDropSwitch.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "k4FWCore/KeepDropSwitch.h"
 
 #include <iostream>
diff --git a/k4FWCore/src/PodioDataSvc.cpp b/k4FWCore/src/PodioDataSvc.cpp
index a41d4fef..08f772b0 100644
--- a/k4FWCore/src/PodioDataSvc.cpp
+++ b/k4FWCore/src/PodioDataSvc.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "k4FWCore/PodioDataSvc.h"
 #include "GaudiKernel/IConversionSvc.h"
 #include "GaudiKernel/IEventProcessor.h"
diff --git a/k4FWCore/src/PodioLegacyDataSvc.cpp b/k4FWCore/src/PodioLegacyDataSvc.cpp
index 07a1b5e7..d21cb46f 100644
--- a/k4FWCore/src/PodioLegacyDataSvc.cpp
+++ b/k4FWCore/src/PodioLegacyDataSvc.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "k4FWCore/PodioLegacyDataSvc.h"
 #include "GaudiKernel/IConversionSvc.h"
 #include "GaudiKernel/IEventProcessor.h"
diff --git a/k4Interface/CMakeLists.txt b/k4Interface/CMakeLists.txt
index f2bb91e8..f39bdf27 100644
--- a/k4Interface/CMakeLists.txt
+++ b/k4Interface/CMakeLists.txt
@@ -1,3 +1,22 @@
+#[[
+Copyright (c) 2014-2023 Key4hep-Project.
+
+This file is part of Key4hep.
+See https://key4hep.github.io/key4hep-doc/ for further info.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+]]
+
 ################################################################################
 # Package: SimG4Interface
 ################################################################################
diff --git a/k4Interface/include/k4Interface/ICalibrateCaloHitsTool.h b/k4Interface/include/k4Interface/ICalibrateCaloHitsTool.h
index 471ff6d8..cfdc6679 100644
--- a/k4Interface/include/k4Interface/ICalibrateCaloHitsTool.h
+++ b/k4Interface/include/k4Interface/ICalibrateCaloHitsTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_ICALIBRATECALOHITSTOOL_H
 #define RECINTERFACE_ICALIBRATECALOHITSTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ICaloCreateMap.h b/k4Interface/include/k4Interface/ICaloCreateMap.h
index eb31928a..6850ecdf 100644
--- a/k4Interface/include/k4Interface/ICaloCreateMap.h
+++ b/k4Interface/include/k4Interface/ICaloCreateMap.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_ICALOCREATEMAP_H
 #define RECINTERFACE_ICALOCREATEMAP_H
 
diff --git a/k4Interface/include/k4Interface/ICaloReadCellNoiseMap.h b/k4Interface/include/k4Interface/ICaloReadCellNoiseMap.h
index a46ae5c3..7f886869 100644
--- a/k4Interface/include/k4Interface/ICaloReadCellNoiseMap.h
+++ b/k4Interface/include/k4Interface/ICaloReadCellNoiseMap.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_ICALOREADCELLNOISEMAP_H
 #define RECINTERFACE_ICALOREADCELLNOISEMAP_H
 
diff --git a/k4Interface/include/k4Interface/ICaloReadNeighboursMap.h b/k4Interface/include/k4Interface/ICaloReadNeighboursMap.h
index 368070ce..e3ea1048 100644
--- a/k4Interface/include/k4Interface/ICaloReadNeighboursMap.h
+++ b/k4Interface/include/k4Interface/ICaloReadNeighboursMap.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_ICALOREADNEIGHBOURSMAP_H
 #define RECINTERFACE_ICALOREADNEIGHBOURSMAP_H
 
diff --git a/k4Interface/include/k4Interface/ICalorimeterTool.h b/k4Interface/include/k4Interface/ICalorimeterTool.h
index a8bc9630..5740afc4 100644
--- a/k4Interface/include/k4Interface/ICalorimeterTool.h
+++ b/k4Interface/include/k4Interface/ICalorimeterTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_ICALORIMETERTOOL_H
 #define RECINTERFACE_ICALORIMETERTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ICellPositionsTool.h b/k4Interface/include/k4Interface/ICellPositionsTool.h
index 78572ae1..cce678a5 100644
--- a/k4Interface/include/k4Interface/ICellPositionsTool.h
+++ b/k4Interface/include/k4Interface/ICellPositionsTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_ICELLPOSITIONSTOOL_H
 #define RECINTERFACE_ICELLPOSITIONSTOOL_H
 
diff --git a/k4Interface/include/k4Interface/IGeoSvc.h b/k4Interface/include/k4Interface/IGeoSvc.h
index 8d4c87e7..d17e2189 100644
--- a/k4Interface/include/k4Interface/IGeoSvc.h
+++ b/k4Interface/include/k4Interface/IGeoSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 #ifndef IGEOSVC_H
 #define IGEOSVC_H
diff --git a/k4Interface/include/k4Interface/INoiseCaloCellsTool.h b/k4Interface/include/k4Interface/INoiseCaloCellsTool.h
index 15868f1c..8498a297 100644
--- a/k4Interface/include/k4Interface/INoiseCaloCellsTool.h
+++ b/k4Interface/include/k4Interface/INoiseCaloCellsTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_INOISECALOCELLSTOOL_H
 #define RECINTERFACE_INOISECALOCELLSTOOL_H
 
diff --git a/k4Interface/include/k4Interface/INoiseConstTool.h b/k4Interface/include/k4Interface/INoiseConstTool.h
index 1ccfec89..15ae84d2 100644
--- a/k4Interface/include/k4Interface/INoiseConstTool.h
+++ b/k4Interface/include/k4Interface/INoiseConstTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_INOISECONSTTOOL_H
 #define RECINTERFACE_INOISECONSTTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4ActionTool.h b/k4Interface/include/k4Interface/ISimG4ActionTool.h
index c44131eb..2ba64528 100644
--- a/k4Interface/include/k4Interface/ISimG4ActionTool.h
+++ b/k4Interface/include/k4Interface/ISimG4ActionTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4ACTIONTOOL_H
 #define SIMG4INTERFACE_ISIMG4ACTIONTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4DetectorConstruction.h b/k4Interface/include/k4Interface/ISimG4DetectorConstruction.h
index a8cd8ed2..b38ccc92 100644
--- a/k4Interface/include/k4Interface/ISimG4DetectorConstruction.h
+++ b/k4Interface/include/k4Interface/ISimG4DetectorConstruction.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4DETECTORCONSTRUCTION_H
 #define SIMG4INTERFACE_ISIMG4DETECTORCONSTRUCTION_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4EventProviderTool.h b/k4Interface/include/k4Interface/ISimG4EventProviderTool.h
index 88bf9535..b309606c 100644
--- a/k4Interface/include/k4Interface/ISimG4EventProviderTool.h
+++ b/k4Interface/include/k4Interface/ISimG4EventProviderTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4EVENTPROVIDERTOOL_H
 #define SIMG4INTERFACE_ISIMG4EVENTPROVIDERTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4GflashTool.h b/k4Interface/include/k4Interface/ISimG4GflashTool.h
index df7b404a..7a8618c2 100644
--- a/k4Interface/include/k4Interface/ISimG4GflashTool.h
+++ b/k4Interface/include/k4Interface/ISimG4GflashTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4GFLASHTOOL_H
 #define SIMG4INTERFACE_ISIMG4GFLASHTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4MagneticFieldTool.h b/k4Interface/include/k4Interface/ISimG4MagneticFieldTool.h
index 96f38548..be4ce6d5 100644
--- a/k4Interface/include/k4Interface/ISimG4MagneticFieldTool.h
+++ b/k4Interface/include/k4Interface/ISimG4MagneticFieldTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4MAGNETICFIELDTOOL_H
 #define SIMG4INTERFACE_ISIM4MAGNETICFIELDTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4ParticleSmearTool.h b/k4Interface/include/k4Interface/ISimG4ParticleSmearTool.h
index c4d2b4b4..496af509 100644
--- a/k4Interface/include/k4Interface/ISimG4ParticleSmearTool.h
+++ b/k4Interface/include/k4Interface/ISimG4ParticleSmearTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4PARTICLESMEARTOOL_H
 #define SIMG4INTERFACE_ISIMG4PARTICLESMEARTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4PhysicsList.h b/k4Interface/include/k4Interface/ISimG4PhysicsList.h
index 5a026244..ed45688b 100644
--- a/k4Interface/include/k4Interface/ISimG4PhysicsList.h
+++ b/k4Interface/include/k4Interface/ISimG4PhysicsList.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4PHYSICSLIST_H
 #define SIMG4INTERFACE_ISIMG4PHYSICSLIST_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4RegionTool.h b/k4Interface/include/k4Interface/ISimG4RegionTool.h
index 60453681..0023f31c 100644
--- a/k4Interface/include/k4Interface/ISimG4RegionTool.h
+++ b/k4Interface/include/k4Interface/ISimG4RegionTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4REGIONTOOL_H
 #define SIMG4INTERFACE_ISIMG4REGIONTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4SaveOutputTool.h b/k4Interface/include/k4Interface/ISimG4SaveOutputTool.h
index 854bf508..a39fe9c4 100644
--- a/k4Interface/include/k4Interface/ISimG4SaveOutputTool.h
+++ b/k4Interface/include/k4Interface/ISimG4SaveOutputTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4SAVEOUTPUTTOOL_H
 #define SIMG4INTERFACE_ISIMG4SAVEOUTPUTTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ISimG4Svc.h b/k4Interface/include/k4Interface/ISimG4Svc.h
index ffafb1b3..8a994583 100644
--- a/k4Interface/include/k4Interface/ISimG4Svc.h
+++ b/k4Interface/include/k4Interface/ISimG4Svc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef SIMG4INTERFACE_ISIMG4SVC_H
 #define SIMG4INTERFACE_ISIMG4SVC_H
 
diff --git a/k4Interface/include/k4Interface/ITestDD4hepSvc.h b/k4Interface/include/k4Interface/ITestDD4hepSvc.h
index 88795c45..8413c405 100644
--- a/k4Interface/include/k4Interface/ITestDD4hepSvc.h
+++ b/k4Interface/include/k4Interface/ITestDD4hepSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef TESTDD4HEP_ITESTDD4HEPSVC_H
 #define TESTDD4HEP_ITESTDD4HEPSVC_H
 
diff --git a/k4Interface/include/k4Interface/ITopoClusterInputTool.h b/k4Interface/include/k4Interface/ITopoClusterInputTool.h
index 41aa6e46..c66fd48b 100644
--- a/k4Interface/include/k4Interface/ITopoClusterInputTool.h
+++ b/k4Interface/include/k4Interface/ITopoClusterInputTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_ITOPOCLUSTERINPUTTOOL_H
 #define RECINTERFACE_ITOPOCLUSTERINPUTTOOL_H
 
diff --git a/k4Interface/include/k4Interface/ITowerTool.h b/k4Interface/include/k4Interface/ITowerTool.h
index 425076c7..b2f1cf5f 100644
--- a/k4Interface/include/k4Interface/ITowerTool.h
+++ b/k4Interface/include/k4Interface/ITowerTool.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef RECINTERFACE_ITOWERTOOL_H
 #define RECINTERFACE_ITOWERTOOL_H
 
diff --git a/k4Interface/include/k4Interface/IUniqueIDGenSvc.h b/k4Interface/include/k4Interface/IUniqueIDGenSvc.h
index 3aba193d..469b63cc 100644
--- a/k4Interface/include/k4Interface/IUniqueIDGenSvc.h
+++ b/k4Interface/include/k4Interface/IUniqueIDGenSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef FWCORE_IUNIQUEIDGENSVC_H
 #define FWCORE_IUNIQUEIDGENSVC_H
 
diff --git a/test/downstream-project-cmake-test/CMakeLists.txt b/test/downstream-project-cmake-test/CMakeLists.txt
index 42b5f984..e824537d 100644
--- a/test/downstream-project-cmake-test/CMakeLists.txt
+++ b/test/downstream-project-cmake-test/CMakeLists.txt
@@ -1,3 +1,21 @@
+#[[
+Copyright (c) 2014-2023 Key4hep-Project.
+
+This file is part of Key4hep.
+See https://key4hep.github.io/key4hep-doc/ for further info.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+]]
 cmake_minimum_required(VERSION 3.11)
 
 
diff --git a/test/downstream-project-cmake-test/main.cxx b/test/downstream-project-cmake-test/main.cxx
index 5927e55f..f6c8a3fb 100644
--- a/test/downstream-project-cmake-test/main.cxx
+++ b/test/downstream-project-cmake-test/main.cxx
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 ///  make sure that downstream projects can include and link upstream properly
 
diff --git a/test/k4FWCoreTest/CMakeLists.txt b/test/k4FWCoreTest/CMakeLists.txt
index 50053eca..707acc07 100644
--- a/test/k4FWCoreTest/CMakeLists.txt
+++ b/test/k4FWCoreTest/CMakeLists.txt
@@ -1,3 +1,22 @@
+#[[
+Copyright (c) 2014-2023 Key4hep-Project.
+
+This file is part of Key4hep.
+See https://key4hep.github.io/key4hep-doc/ for further info.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+]]
+
 ################################################################################
 # Package: k4FWCoreTest
 ################################################################################
diff --git a/test/k4FWCoreTest/options/TestAlgorithmWithTFile.py b/test/k4FWCoreTest/options/TestAlgorithmWithTFile.py
index 69da06e9..60b500c9 100644
--- a/test/k4FWCoreTest/options/TestAlgorithmWithTFile.py
+++ b/test/k4FWCoreTest/options/TestAlgorithmWithTFile.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import k4DataSvc
diff --git a/test/k4FWCoreTest/options/TestArgs.py b/test/k4FWCoreTest/options/TestArgs.py
index b8e7f962..cc645183 100644
--- a/test/k4FWCoreTest/options/TestArgs.py
+++ b/test/k4FWCoreTest/options/TestArgs.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from k4FWCore.parseArgs import parser
 parser.add_argument("-f", "--foo", type=int, help="hello world")
 my_opts = parser.parse_known_args()
diff --git a/test/k4FWCoreTest/options/TestDataHandleUniquePtr.py b/test/k4FWCoreTest/options/TestDataHandleUniquePtr.py
index 881836ef..6b95ba97 100644
--- a/test/k4FWCoreTest/options/TestDataHandleUniquePtr.py
+++ b/test/k4FWCoreTest/options/TestDataHandleUniquePtr.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import ApplicationMgr
diff --git a/test/k4FWCoreTest/options/TestUniqueIDGenSvc.py b/test/k4FWCoreTest/options/TestUniqueIDGenSvc.py
index acc195e6..e4ed0c83 100644
--- a/test/k4FWCoreTest/options/TestUniqueIDGenSvc.py
+++ b/test/k4FWCoreTest/options/TestUniqueIDGenSvc.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import UniqueIDGenSvc
diff --git a/test/k4FWCoreTest/options/TwoProducers.py b/test/k4FWCoreTest/options/TwoProducers.py
index 6e734549..6a350614 100644
--- a/test/k4FWCoreTest/options/TwoProducers.py
+++ b/test/k4FWCoreTest/options/TwoProducers.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import ApplicationMgr
diff --git a/test/k4FWCoreTest/options/checkExampleEventData.py b/test/k4FWCoreTest/options/checkExampleEventData.py
index 9b75d977..92a31747 100644
--- a/test/k4FWCoreTest/options/checkExampleEventData.py
+++ b/test/k4FWCoreTest/options/checkExampleEventData.py
@@ -1,4 +1,22 @@
 #!/usr/bin/env python3
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import k4DataSvc
diff --git a/test/k4FWCoreTest/options/createExampleEventData.py b/test/k4FWCoreTest/options/createExampleEventData.py
index ee1883f2..7b00da74 100644
--- a/test/k4FWCoreTest/options/createExampleEventData.py
+++ b/test/k4FWCoreTest/options/createExampleEventData.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import k4DataSvc
diff --git a/test/k4FWCoreTest/options/createExampleEventData_cellID.py b/test/k4FWCoreTest/options/createExampleEventData_cellID.py
index ed48c82c..6ae3024c 100644
--- a/test/k4FWCoreTest/options/createExampleEventData_cellID.py
+++ b/test/k4FWCoreTest/options/createExampleEventData_cellID.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import k4DataSvc
diff --git a/test/k4FWCoreTest/options/createHelloWorld.py b/test/k4FWCoreTest/options/createHelloWorld.py
index e0a81dd1..6c0712d8 100644
--- a/test/k4FWCoreTest/options/createHelloWorld.py
+++ b/test/k4FWCoreTest/options/createHelloWorld.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import ApplicationMgr
diff --git a/test/k4FWCoreTest/options/createLegacyExampleEventData.py b/test/k4FWCoreTest/options/createLegacyExampleEventData.py
index fdfab0d2..46281c4d 100644
--- a/test/k4FWCoreTest/options/createLegacyExampleEventData.py
+++ b/test/k4FWCoreTest/options/createLegacyExampleEventData.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import k4LegacyDataSvc
diff --git a/test/k4FWCoreTest/options/readExampleDataFromNthEvent.py b/test/k4FWCoreTest/options/readExampleDataFromNthEvent.py
index 020b784d..a70fa35b 100644
--- a/test/k4FWCoreTest/options/readExampleDataFromNthEvent.py
+++ b/test/k4FWCoreTest/options/readExampleDataFromNthEvent.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import k4DataSvc
diff --git a/test/k4FWCoreTest/options/readExampleEventData.py b/test/k4FWCoreTest/options/readExampleEventData.py
index d145c95e..56149f7e 100644
--- a/test/k4FWCoreTest/options/readExampleEventData.py
+++ b/test/k4FWCoreTest/options/readExampleEventData.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import k4DataSvc
diff --git a/test/k4FWCoreTest/options/readLegacyExampleEventData.py b/test/k4FWCoreTest/options/readLegacyExampleEventData.py
index 022cb531..08c2eb69 100644
--- a/test/k4FWCoreTest/options/readLegacyExampleEventData.py
+++ b/test/k4FWCoreTest/options/readLegacyExampleEventData.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 from Gaudi.Configuration import *
 
 from Configurables import k4LegacyDataSvc
diff --git a/test/k4FWCoreTest/scripts/check_KeepDropSwitch.py b/test/k4FWCoreTest/scripts/check_KeepDropSwitch.py
index 4274261d..fa96983e 100644
--- a/test/k4FWCoreTest/scripts/check_KeepDropSwitch.py
+++ b/test/k4FWCoreTest/scripts/check_KeepDropSwitch.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 import ROOT
 
 ROOT.gSystem.Load("libedm4hepDict")
diff --git a/test/k4FWCoreTest/scripts/check_TestAlgorithmWithTFile_framework_nonempty.py b/test/k4FWCoreTest/scripts/check_TestAlgorithmWithTFile_framework_nonempty.py
index 317a4a29..5baf3037 100644
--- a/test/k4FWCoreTest/scripts/check_TestAlgorithmWithTFile_framework_nonempty.py
+++ b/test/k4FWCoreTest/scripts/check_TestAlgorithmWithTFile_framework_nonempty.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 import ROOT
 
 f = ROOT.TFile.Open("output_TestAlgorithmWithTFile_framework.root")
diff --git a/test/k4FWCoreTest/scripts/check_TestAlgorithmWithTFile_myTFile_nonempty.py b/test/k4FWCoreTest/scripts/check_TestAlgorithmWithTFile_myTFile_nonempty.py
index 795d7a9c..7c86b1c4 100644
--- a/test/k4FWCoreTest/scripts/check_TestAlgorithmWithTFile_myTFile_nonempty.py
+++ b/test/k4FWCoreTest/scripts/check_TestAlgorithmWithTFile_myTFile_nonempty.py
@@ -1,3 +1,21 @@
+#
+# Copyright (c) 2014-2023 Key4hep-Project.
+#
+# This file is part of Key4hep.
+# See https://key4hep.github.io/key4hep-doc/ for further info.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
 import ROOT
 
 f = ROOT.TFile.Open("output_TestAlgorithmWithTFile_myTFile.root")
diff --git a/test/k4FWCoreTest/src/components/TestDataHandleUniquePtr.cpp b/test/k4FWCoreTest/src/components/TestDataHandleUniquePtr.cpp
index fae7ac64..edb7d316 100644
--- a/test/k4FWCoreTest/src/components/TestDataHandleUniquePtr.cpp
+++ b/test/k4FWCoreTest/src/components/TestDataHandleUniquePtr.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "TestDataHandleUniquePtr.h"
 
 // datamodel
diff --git a/test/k4FWCoreTest/src/components/TestDataHandleUniquePtr.h b/test/k4FWCoreTest/src/components/TestDataHandleUniquePtr.h
index e53ccdf1..b46ac0d9 100644
--- a/test/k4FWCoreTest/src/components/TestDataHandleUniquePtr.h
+++ b/test/k4FWCoreTest/src/components/TestDataHandleUniquePtr.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef TESTFWCORE_TESTDATAHANDLEUNIQUEPTR
 #define TESTFWCORE_TESTDATAHANDLEUNIQUEPTR
 
diff --git a/test/k4FWCoreTest/src/components/TestUniqueIDGenSvc.cpp b/test/k4FWCoreTest/src/components/TestUniqueIDGenSvc.cpp
index b4f6a9a4..ed7f52b6 100644
--- a/test/k4FWCoreTest/src/components/TestUniqueIDGenSvc.cpp
+++ b/test/k4FWCoreTest/src/components/TestUniqueIDGenSvc.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "TestUniqueIDGenSvc.h"
 
 DECLARE_COMPONENT(TestUniqueIDGenSvc)
diff --git a/test/k4FWCoreTest/src/components/TestUniqueIDGenSvc.h b/test/k4FWCoreTest/src/components/TestUniqueIDGenSvc.h
index 5d2650da..acdc69ba 100644
--- a/test/k4FWCoreTest/src/components/TestUniqueIDGenSvc.h
+++ b/test/k4FWCoreTest/src/components/TestUniqueIDGenSvc.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef TEST_UNIQUEIDGENSVC_H
 #define TEST_UNIQUEIDGENSVC_H
 
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_AlgorithmWithTFile.cpp b/test/k4FWCoreTest/src/components/k4FWCoreTest_AlgorithmWithTFile.cpp
index 16b6abff..f3661e91 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_AlgorithmWithTFile.cpp
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_AlgorithmWithTFile.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "k4FWCoreTest_AlgorithmWithTFile.h"
 
 // datamodel
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_AlgorithmWithTFile.h b/test/k4FWCoreTest/src/components/k4FWCoreTest_AlgorithmWithTFile.h
index 0440e49f..1b505d7e 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_AlgorithmWithTFile.h
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_AlgorithmWithTFile.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef K4FWCORE_K4FWCORETEST_ALGORITHMWITHTFILE
 #define K4FWCORE_K4FWCORETEST_ALGORITHMWITHTFILE
 
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_CheckExampleEventData.cpp b/test/k4FWCoreTest/src/components/k4FWCoreTest_CheckExampleEventData.cpp
index cc72cae3..4614989d 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_CheckExampleEventData.cpp
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_CheckExampleEventData.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "k4FWCoreTest_CheckExampleEventData.h"
 #include <GaudiAlg/GaudiAlgorithm.h>
 
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_CheckExampleEventData.h b/test/k4FWCoreTest/src/components/k4FWCoreTest_CheckExampleEventData.h
index e4e5447c..a28b1cb6 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_CheckExampleEventData.h
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_CheckExampleEventData.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef K4FWCORE_K4FWCORETEST_CHECKEEXAMPLEEVENTDATA
 #define K4FWCORE_K4FWCORETEST_CHECKEEXAMPLEEVENTDATA
 
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_CreateExampleEventData.cpp b/test/k4FWCoreTest/src/components/k4FWCoreTest_CreateExampleEventData.cpp
index 2c8e4654..33eea1fa 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_CreateExampleEventData.cpp
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_CreateExampleEventData.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "k4FWCoreTest_CreateExampleEventData.h"
 
 #include "podio/UserDataCollection.h"
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_CreateExampleEventData.h b/test/k4FWCoreTest/src/components/k4FWCoreTest_CreateExampleEventData.h
index a85f4cd1..0a923a07 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_CreateExampleEventData.h
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_CreateExampleEventData.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef K4FWCORE_K4FWCORETEST_CREATEEXAMPLEEVENTDATA
 #define K4FWCORE_K4FWCORETEST_CREATEEXAMPLEEVENTDATA
 
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_HelloWorldAlg.cpp b/test/k4FWCoreTest/src/components/k4FWCoreTest_HelloWorldAlg.cpp
index bd32ff70..86cf898b 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_HelloWorldAlg.cpp
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_HelloWorldAlg.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "k4FWCoreTest_HelloWorldAlg.h"
 #include "GaudiKernel/MsgStream.h"
 
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_HelloWorldAlg.h b/test/k4FWCoreTest/src/components/k4FWCoreTest_HelloWorldAlg.h
index 5628fdf6..40769eb0 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_HelloWorldAlg.h
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_HelloWorldAlg.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef K4FWCORE_K4FWCORETEST_HELLOWORLDALG
 #define K4FWCORE_K4FWCORETEST_HELLOWORLDALG
 
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_reader.cpp b/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_reader.cpp
index 01c187e1..2ebe93aa 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_reader.cpp
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_reader.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "k4FWCoreTest_cellID_reader.h"
 #include "k4FWCoreTest_cellID_writer.h"
 
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_reader.h b/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_reader.h
index 85898ede..c40f8b3d 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_reader.h
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_reader.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef K4FWCORE_K4FWCORETEST_CELLID_READER
 #define K4FWCORE_K4FWCORETEST_CELLID_READER
 
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_writer.cpp b/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_writer.cpp
index 619db3de..f5f5b61f 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_writer.cpp
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_writer.cpp
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #include "k4FWCoreTest_cellID_writer.h"
 
 DECLARE_COMPONENT(k4FWCoreTest_cellID_writer)
diff --git a/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_writer.h b/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_writer.h
index ce6d2344..ef7c7a33 100644
--- a/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_writer.h
+++ b/test/k4FWCoreTest/src/components/k4FWCoreTest_cellID_writer.h
@@ -1,3 +1,21 @@
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef K4FWCORE_K4FWCORETEST_CELLID_WRITER
 #define K4FWCORE_K4FWCORETEST_CELLID_WRITER