diff --git a/src/server/BreCal/validators/input_validation_shipcall.py b/src/server/BreCal/validators/input_validation_shipcall.py
index 5eb561f..0dd8850 100644
--- a/src/server/BreCal/validators/input_validation_shipcall.py
+++ b/src/server/BreCal/validators/input_validation_shipcall.py
@@ -127,9 +127,8 @@ class InputValidationShipcall():
         if is_put_data:
             # the type of a shipcall may not be changed. It can only be set with the initial POST-request.
             InputValidationShipcall.check_shipcall_type_is_unchanged(loadedModel)
-        else:
-            # time values must use future-dates
-            InputValidationShipcall.check_times_are_in_future(loadedModel, content)
+
+        InputValidationShipcall.check_times_are_in_future(loadedModel, content)
 
         # some arguments must not be provided
         InputValidationShipcall.check_forbidden_arguments(content, forbidden_keys=forbidden_keys)
@@ -328,7 +327,7 @@ class InputValidationShipcall():
     def check_times_are_in_future(loadedModel:dict, content:dict):
         """
         Dates should be in the future. Depending on the ShipcallType, specific values should be checked
-        Perfornms datetime checks in the loadedModel (datetime.datetime objects).
+        Performs datetime checks in the loadedModel (datetime.datetime objects).
         """
         # obtain the current datetime to check, whether the provided values are after ref time
         time_ref = datetime.datetime.now() - datetime.timedelta(days=1)
@@ -367,6 +366,8 @@ class InputValidationShipcall():
         if (eta is None) and (etd is None):
             return
 
+        time_in_a_year = datetime.datetime.now().replace(datetime.datetime.now().year + 1)
+
         if type_ is None:
             raise ValidationError({"type":f"when providing 'eta' or 'etd', one must provide the type of the shipcall, so the datetimes can be verified."})
 
@@ -384,6 +385,8 @@ class InputValidationShipcall():
                 raise ValidationError({"eta":f"'eta' is too far in the past. Incorrect datetime provided. Current Time: {time_ref}. ETA: {eta}."})
             if etd is not None:
                 raise ValidationError({"etd":f"'etd' should not be set when the shipcall type is 'arrival'."})
+            if eta > time_in_a_year:
+                raise ValidationError({"eta":f"'eta' is more than a year in the future. ETA: {eta}."})
 
         elif int(type_)==int(ShipcallType.departure):
             if etd is None: # null values -> no violation
@@ -394,6 +397,8 @@ class InputValidationShipcall():
 
             if eta is not None:
                 raise ValidationError({"eta":f"'eta' should not be set when the shipcall type is 'departure'."})
+            if etd > time_in_a_year:
+                raise ValidationError({"etd":f"'etd' is more than a year in the future. ETD: {etd}."})
 
         elif int(type_)==int(ShipcallType.shifting):
             if (eta is None) and (etd is None): # null values -> no violation
@@ -411,21 +416,36 @@ class InputValidationShipcall():
 
             if (eta is not None and etd is None) or (eta is None and etd is not None):
                 raise ValidationError({"eta_or_etd":f"'eta' and 'etd' must both be provided when the shipcall type is 'shifting'."})
+            if eta > time_in_a_year:
+                raise ValidationError({"eta":f"'eta' is more than a year in the future. ETA: {eta}."})
+            if etd > time_in_a_year:
+                raise ValidationError({"etd":f"'etd' is more than a year in the future. ETD: {etd}."})
+
         return
 
     @staticmethod
     def check_tidal_window_in_future(type_, time_ref, tidal_window_from, tidal_window_to):
+
+        time_in_a_year = datetime.datetime.now().replace(datetime.datetime.now().year + 1)
         if tidal_window_to is not None:
             if not tidal_window_to >= time_ref:
                 raise ValidationError({"tidal_window_to":f"'tidal_window_to' is too far in the past. Incorrect datetime provided."})
+            if tidal_window_to > time_in_a_year:
+                raise ValidationError({"tidal_window_to":f"'tidal_window_to' is more than a year in the future. Found: {tidal_window_to}."})
 
         if tidal_window_from is not None:
             if not tidal_window_from >= time_ref:
                 raise ValidationError({"tidal_window_from":f"'tidal_window_from' is too far in the past. Incorrect datetime provided."})
+            if tidal_window_from > time_in_a_year:
+                raise ValidationError({"tidal_window_from":f"'tidal_window_from' is more than a year in the future. Found: {tidal_window_from}."})
 
         if (tidal_window_to is not None) and (tidal_window_from is not None):
             if tidal_window_to < tidal_window_from:
                 raise ValidationError({"tidal_window_to_or_tidal_window_from":f"'tidal_window_to' must take place after 'tidal_window_from'. Incorrect datetime provided. Found 'tidal_window_to': {tidal_window_to}, 'tidal_window_from': {tidal_window_to}."})
+
+        if (tidal_window_to is not None and tidal_window_from is None) or (tidal_window_to is None and tidal_window_from is not None):
+            raise ValidationError({"tidal_window_to_or_tidal_window_from":f"'tidal_window_to' and 'tidal_window_from' must both be provided."})
+
         return
 
     @staticmethod
diff --git a/src/server/BreCal/validators/input_validation_times.py b/src/server/BreCal/validators/input_validation_times.py
index 25c58df..9db0a2c 100644
--- a/src/server/BreCal/validators/input_validation_times.py
+++ b/src/server/BreCal/validators/input_validation_times.py
@@ -124,7 +124,8 @@ class InputValidationTimes():
         InputValidationTimes.check_if_entry_is_already_deleted(times_id)
 
         # 2.) Only users of the same participant_id, which the times dataset refers to, can delete the entry
-        InputValidationTimes.check_user_belongs_to_same_group_as_dataset_determines(user_data, loadedModel=None, times_id=times_id)
+        if not check_if_user_is_bsmd_type(user_data):
+            InputValidationTimes.check_user_belongs_to_same_group_as_dataset_determines(user_data, loadedModel=None, times_id=times_id)
         return
 
     @staticmethod
diff --git a/src/server/BreCal/validators/validation_error.py b/src/server/BreCal/validators/validation_error.py
index 823a924..b10673d 100644
--- a/src/server/BreCal/validators/validation_error.py
+++ b/src/server/BreCal/validators/validation_error.py
@@ -41,7 +41,7 @@ def unbundle_validation_error_message(message):
     unbundle_(message, unbundled=unbundled)
     if len(unbundled)>0:
         error_field = "ValidationError in the following field(s): " + " & ".join([unb["error_field"] for unb in unbundled])
-        error_description = "Error Description(s): " + " & ".join([unb["error_description"] for unb in unbundled])
+        error_description = " " . join([unb["error_description"] for unb in unbundled])
     else:
         error_field = "ValidationError"
         error_description = "unknown validation error"