diff --git a/release/models/ptp/openconfig-ptp-types.yang b/release/models/ptp/openconfig-ptp-types.yang
index 9f65ef779..1405bd697 100644
--- a/release/models/ptp/openconfig-ptp-types.yang
+++ b/release/models/ptp/openconfig-ptp-types.yang
@@ -28,7 +28,11 @@ module openconfig-ptp-types {
 
   description
     "This module defines types and identities used in OpenConfig
-    models related to Precision Time Protocol (PTP)";
+    models related to Precision Time Protocol (PTP).
+    
+    IEEE code is subject to the following copyright and license:
+    Copyright (c) 2020 by The Institute of Electrical and Electronics
+    Engineers, Inc. All rights reserved.";
 
   oc-ext:openconfig-version "0.1.0";
 
diff --git a/release/models/ptp/openconfig-ptp.yang b/release/models/ptp/openconfig-ptp.yang
index 6445f4b4e..b450ba288 100644
--- a/release/models/ptp/openconfig-ptp.yang
+++ b/release/models/ptp/openconfig-ptp.yang
@@ -68,7 +68,11 @@ module openconfig-ptp {
     YANG Data Models). For a detailed explanation, see 15.4.2.11
     of IEEE Std 1588e.
     This module uses the original terminology specified by
-    IEEE Std 1588 (master/slave).";
+    IEEE Std 1588 (master/slave).
+    
+    IEEE code is subject to the following copyright and license:
+    Copyright (c) 2020 by The Institute of Electrical and Electronics
+    Engineers, Inc. All rights reserved.";
 
   revision 2024-05-01 {
     description