diff --git a/jit/src/main/java/org/dcsa/conformance/standards/jit/action/JitPortCallServiceAction.java b/jit/src/main/java/org/dcsa/conformance/standards/jit/action/JitPortCallServiceAction.java
index c8587dc9..d67fb4ea 100644
--- a/jit/src/main/java/org/dcsa/conformance/standards/jit/action/JitPortCallServiceAction.java
+++ b/jit/src/main/java/org/dcsa/conformance/standards/jit/action/JitPortCallServiceAction.java
@@ -34,7 +34,7 @@ public JitPortCallServiceAction(
         serviceType != null ? "Port Call Service: " + serviceType.name() : "Port Call Service");
     validator = context.componentFactory().getMessageSchemaValidator(JitSchema.PORT_CALL_SERVICE);
     if (serviceType == null && previousAction instanceof JitPortCallServiceAction && dsp != null) {
-      serviceType = dsp.chosenServiceType();
+      serviceType = dsp.portCallServiceType();
     }
     this.serviceType = serviceType;
   }
diff --git a/jit/src/main/java/org/dcsa/conformance/standards/jit/action/JitTimestampAction.java b/jit/src/main/java/org/dcsa/conformance/standards/jit/action/JitTimestampAction.java
index 39c56ec3..8d206c1f 100644
--- a/jit/src/main/java/org/dcsa/conformance/standards/jit/action/JitTimestampAction.java
+++ b/jit/src/main/java/org/dcsa/conformance/standards/jit/action/JitTimestampAction.java
@@ -54,10 +54,7 @@ protected void doHandleExchange(ConformanceExchange exchange) {
     JitTimestamp receivedTimestamp = JitTimestamp.fromJson(requestJsonNode);
     dsp =
         dsp.withPreviousTimestamp(dsp.currentTimestamp())
-            .withCurrentTimestamp(receivedTimestamp)
-            .withTimestampDateTime(receivedTimestamp.dateTime())
-            .withTimestampType(
-                JitTimestampType.fromClassifierCode(receivedTimestamp.classifierCode()));
+            .withCurrentTimestamp(receivedTimestamp);
   }
 
   @Override
diff --git a/jit/src/main/java/org/dcsa/conformance/standards/jit/action/SupplyScenarioParametersAction.java b/jit/src/main/java/org/dcsa/conformance/standards/jit/action/SupplyScenarioParametersAction.java
index 2d32804e..8b2ac919 100644
--- a/jit/src/main/java/org/dcsa/conformance/standards/jit/action/SupplyScenarioParametersAction.java
+++ b/jit/src/main/java/org/dcsa/conformance/standards/jit/action/SupplyScenarioParametersAction.java
@@ -60,13 +60,10 @@ public void handlePartyInput(JsonNode partyInput) {
         new DynamicScenarioParameters(
             null,
             null,
-            null,
-            null,
-            null,
+            suppliedScenarioParameters.serviceType(),
             suppliedScenarioParameters.portCallID(),
             suppliedScenarioParameters.terminalCallID(),
             suppliedScenarioParameters.portCallServiceID(),
-            suppliedScenarioParameters.serviceType(),
             selector);
   }
 }
diff --git a/jit/src/main/java/org/dcsa/conformance/standards/jit/party/DynamicScenarioParameters.java b/jit/src/main/java/org/dcsa/conformance/standards/jit/party/DynamicScenarioParameters.java
index c97e69fb..8e1a7863 100644
--- a/jit/src/main/java/org/dcsa/conformance/standards/jit/party/DynamicScenarioParameters.java
+++ b/jit/src/main/java/org/dcsa/conformance/standards/jit/party/DynamicScenarioParameters.java
@@ -8,26 +8,22 @@
 import org.dcsa.conformance.core.party.ScenarioParameters;
 import org.dcsa.conformance.standards.jit.model.JitServiceTypeSelector;
 import org.dcsa.conformance.standards.jit.model.JitTimestamp;
-import org.dcsa.conformance.standards.jit.model.JitTimestampType;
 import org.dcsa.conformance.standards.jit.model.PortCallServiceType;
 
 @With
 @JsonInclude(JsonInclude.Include.NON_NULL)
 public record DynamicScenarioParameters(
-    JitTimestampType timestampType,
     JitTimestamp previousTimestamp,
     JitTimestamp currentTimestamp,
     PortCallServiceType portCallServiceType,
-    String timestampDateTime,
     String portCallID,
     String terminalCallID,
     String portCallServiceID,
-    PortCallServiceType chosenServiceType,
     JitServiceTypeSelector selector)
     implements ScenarioParameters {
 
   public DynamicScenarioParameters() {
-    this(null, null, null, null, null, null, null, null, null, null);
+    this(null, null, null, null, null, null, null);
   }
 
   public static DynamicScenarioParameters fromJson(JsonNode jsonNode) {
diff --git a/jit/src/main/java/org/dcsa/conformance/standards/jit/party/JitProvider.java b/jit/src/main/java/org/dcsa/conformance/standards/jit/party/JitProvider.java
index 21e497d2..909328d5 100644
--- a/jit/src/main/java/org/dcsa/conformance/standards/jit/party/JitProvider.java
+++ b/jit/src/main/java/org/dcsa/conformance/standards/jit/party/JitProvider.java
@@ -111,7 +111,7 @@ private void portCallServiceRequest(JsonNode actionPrompt) {
     if (actionPrompt.has(JitPortCallServiceAction.SERVICE_TYPE)) {
       serviceType = actionPrompt.required(JitPortCallServiceAction.SERVICE_TYPE).asText();
     } else {
-      serviceType = dsp.chosenServiceType().name();
+      serviceType = dsp.portCallServiceType().name();
     }
     dsp = dsp.withPortCallServiceType(PortCallServiceType.fromName(serviceType));
     JsonNode jsonBody = replacePlaceHolders("port-call-service", dsp);