diff --git a/entity/DistrictResponsible_entity/DistrictResponsible_entity.aod b/entity/DistrictResponsible_entity/DistrictResponsible_entity.aod
index 072d0d6bd0bdb70309c061bf6b7dc9d077e2412c..d62d7f9dc75d01b7e9904a330e9e5c40c51f4291 100644
--- a/entity/DistrictResponsible_entity/DistrictResponsible_entity.aod
+++ b/entity/DistrictResponsible_entity/DistrictResponsible_entity.aod
@@ -204,6 +204,7 @@
       <title>Valid from</title>
       <contentType>DATE</contentType>
       <resolution>DAY</resolution>
+      <mandatory v="true" />
     </entityField>
     <entityField>
       <name>VALID_UNTIL</name>