diff --git a/backend-compliance/compliance/services/specialist_agents/impressum/v3_engine.py b/backend-compliance/compliance/services/specialist_agents/impressum/v3_engine.py
index 85118799..5472404d 100644
--- a/backend-compliance/compliance/services/specialist_agents/impressum/v3_engine.py
+++ b/backend-compliance/compliance/services/specialist_agents/impressum/v3_engine.py
@@ -182,12 +182,18 @@ def _filter_controls(
     for c in controls:
         cid = c.get("control_id") or ""
         prefix = cid.split("-")[0].upper() if "-" in cid else ""
+        on_topic = criteria_on_topic(c.get("pass_criteria"),
+                                     c.get("fail_criteria"))
         required = SECTOR_PREFIXES.get(prefix)
-        if required and not (scope_lc & required):
+        # Sektor-Gate nur fuer NICHT-on-topic Controls: ein klar
+        # impressum-thematischer Control (z.B. MStV §18(1) mit GOV-Prefix
+        # aus der Domain-Erkennung der Control-Generierung) darf nicht am
+        # Branchen-Prefix scheitern. Der Themen-Ueberlapp ist der staerkere
+        # Relevanz-Beweis als ein vererbter ID-Prefix.
+        if required and not (scope_lc & required) and not on_topic:
             sector_dropped += 1
             continue
-        if not criteria_on_topic(c.get("pass_criteria"),
-                                 c.get("fail_criteria")):
+        if not on_topic:
             offtopic_dropped += 1
             continue
         kept.append(c)