/resources/campaign_criterion.proto 

--- v25/resources/campaign_criterion.proto  2026-10-26 16:32:22.000000000 +0000
+++ v26/resources/campaign_criterion.proto  2026-10-26 16:32:27.000000000 +0000
@@ -82,9 +82,14 @@
       [(google.api.field_behavior) = OUTPUT_ONLY];

   // The status of the criterion.
-  google.ads.googleads.v25.enums.CampaignCriterionStatusEnum
+  google.ads.googleads.v26.enums.CampaignCriterionStatusEnum
       .CampaignCriterionStatus status = 35;

+  // Output only. Indicates whether using this criterion requires setting
+  // Campaign.contains_eu_political_advertising field.
+  optional bool require_eu_political_advertising_declaration = 53
+      [(google.api.field_behavior) = OUTPUT_ONLY];
+
   // The campaign criterion.
   //
   // Exactly one must be set.