diff --git a/src/server/BreCal/validators/input_validation_times.py b/src/server/BreCal/validators/input_validation_times.py
index dbe4b3b..688c651 100644
--- a/src/server/BreCal/validators/input_validation_times.py
+++ b/src/server/BreCal/validators/input_validation_times.py
@@ -29,32 +29,32 @@ def build_post_data_type_dependent_required_fields_dict()->dict[ShipcallType,dic
         ShipcallType.arrival:{
             ParticipantType.undefined:[], # should not be set in POST requests
             ParticipantType.BSMD:[], # should not be set in POST requests
-            ParticipantType.TERMINAL:["operations_start"],
-            ParticipantType.AGENCY:["eta_berth"],
-            ParticipantType.MOORING:["eta_berth"],
-            ParticipantType.PILOT:["eta_berth"],
-            ParticipantType.PORT_ADMINISTRATION:["eta_berth"],
-            ParticipantType.TUG:["eta_berth"],
+            ParticipantType.TERMINAL:[],
+            ParticipantType.AGENCY:[],
+            ParticipantType.MOORING:[],
+            ParticipantType.PILOT:[],
+            ParticipantType.PORT_ADMINISTRATION:[],
+            ParticipantType.TUG:[],
         },
         ShipcallType.departure:{
             ParticipantType.undefined:[], # should not be set in POST requests
             ParticipantType.BSMD:[], # should not be set in POST requests
-            ParticipantType.TERMINAL:["operations_end"],
-            ParticipantType.AGENCY:["etd_berth"],
-            ParticipantType.MOORING:["etd_berth"],
-            ParticipantType.PILOT:["etd_berth"],
-            ParticipantType.PORT_ADMINISTRATION:["etd_berth"],
-            ParticipantType.TUG:["etd_berth"],
+            ParticipantType.TERMINAL:[],
+            ParticipantType.AGENCY:[],
+            ParticipantType.MOORING:[],
+            ParticipantType.PILOT:[],
+            ParticipantType.PORT_ADMINISTRATION:[],
+            ParticipantType.TUG:[],
         },
         ShipcallType.shifting:{
             ParticipantType.undefined:[], # should not be set in POST requests
             ParticipantType.BSMD:[], # should not be set in POST requests
-            ParticipantType.TERMINAL:["operations_start"],
-            ParticipantType.AGENCY:["etd_berth"],
-            ParticipantType.MOORING:["etd_berth"],
-            ParticipantType.PILOT:["etd_berth"],
-            ParticipantType.PORT_ADMINISTRATION:["etd_berth"],
-            ParticipantType.TUG:["etd_berth"],
+            ParticipantType.TERMINAL:[],
+            ParticipantType.AGENCY:[],
+            ParticipantType.MOORING:[],
+            ParticipantType.PILOT:[],
+            ParticipantType.PORT_ADMINISTRATION:[],
+            ParticipantType.TUG:[],
         },
     }
     return post_data_type_dependent_required_fields_dict
@@ -482,3 +482,44 @@ class InputValidationTimes():
         has_bsmd_flag = ParticipantFlag.BSMD in [ParticipantFlag(participant.get("flags"))]
         return has_bsmd_flag
 
+
+def deprecated_build_post_data_type_dependent_required_fields_dict()->dict[ShipcallType,dict[ParticipantType,typing.Optional[list[str]]]]:
+    """
+    The required fields of a POST-request depend on ShipcallType and ParticipantType. This function creates
+    a dictionary, which maps those types to a list of required fields.
+
+    The participant types 'undefined' and 'bsmd' should not be used in POST-requests. They return 'None'. 
+    """
+    post_data_type_dependent_required_fields_dict = {
+        ShipcallType.arrival:{
+            ParticipantType.undefined:[], # should not be set in POST requests
+            ParticipantType.BSMD:[], # should not be set in POST requests
+            ParticipantType.TERMINAL:[],
+            ParticipantType.AGENCY:["eta_berth"],
+            ParticipantType.MOORING:["eta_berth"],
+            ParticipantType.PILOT:["eta_berth"],
+            ParticipantType.PORT_ADMINISTRATION:["eta_berth"],
+            ParticipantType.TUG:["eta_berth"],
+        },
+        ShipcallType.departure:{
+            ParticipantType.undefined:[], # should not be set in POST requests
+            ParticipantType.BSMD:[], # should not be set in POST requests
+            ParticipantType.TERMINAL:[],
+            ParticipantType.AGENCY:["etd_berth"],
+            ParticipantType.MOORING:["etd_berth"],
+            ParticipantType.PILOT:["etd_berth"],
+            ParticipantType.PORT_ADMINISTRATION:["etd_berth"],
+            ParticipantType.TUG:["etd_berth"],
+        },
+        ShipcallType.shifting:{
+            ParticipantType.undefined:[], # should not be set in POST requests
+            ParticipantType.BSMD:[], # should not be set in POST requests
+            ParticipantType.TERMINAL:[],
+            ParticipantType.AGENCY:["etd_berth"],
+            ParticipantType.MOORING:["etd_berth"],
+            ParticipantType.PILOT:["etd_berth"],
+            ParticipantType.PORT_ADMINISTRATION:["etd_berth"],
+            ParticipantType.TUG:["etd_berth"],
+        },
+    }
+    return post_data_type_dependent_required_fields_dict