diff --git a/ckanext/odsh/validation.py b/ckanext/odsh/validation.py
index d457fd8f6176890d9171e8a1c614656896d28f31..78a77924691819bbb89df383f15ab821ddc73548 100644
--- a/ckanext/odsh/validation.py
+++ b/ckanext/odsh/validation.py
@@ -66,9 +66,10 @@ def validate_extras(key, data, errors, context):
     
     isStaNord = ('id',) in data and data[('id',)][:7] == 'StaNord'
     isLVermGeo = ('owner_org',) in data and data[('owner_org',)] == '01115337-01d1-4e96-aa8e-9749524889c7'
+    isUmweltportal = ('owner_org',) in data and data[('owner_org',)] == '09871195-cd0a-4767-9396-276404c940d9'
     is_optional_temporal_start = toolkit.asbool(
         config.get('ckanext.odsh.is_optional_temporal_start', False)
-    ) or isStaNord or isLVermGeo
+    ) or isStaNord or isLVermGeo or isUmweltportal
 
     require_at_least_one_category = toolkit.asbool(
         config.get('ckanext.odsh.require_at_least_one_category', False)