Index: trunk/resources/data/validator/relation.mapcss
===================================================================
--- trunk/resources/data/validator/relation.mapcss	(revision 16006)
+++ trunk/resources/data/validator/relation.mapcss	(revision 16255)
@@ -11,5 +11,4 @@
 relation[type=route][!route],
 relation[type=route_master][!route_master],
-relation[type=restriction][!/^restriction/], /* see #11586 */
 relation[type=boundary][!boundary][!disused:boundary],
 relation[type=public_transport][!public_transport],
@@ -22,6 +21,4 @@
   assertMatch: "relation type=route_master";
   assertNoMatch: "relation type=route_master route_master=train";
-  assertMatch: "relation type=restriction";
-  assertNoMatch: "relation type=restriction restriction=no_left_turn";
   assertMatch: "relation type=boundary";
   assertNoMatch: "relation type=boundary boundary=administrative";
@@ -35,4 +32,13 @@
 }
 
+/* #11586 */
+relation[type=restriction][!/^restriction/]{ 
+  throwWarning: tr("{0} relation without {0} tag", "restriction");
+  group: tr("missing tag");
+  assertMatch: "relation type=restriction";
+  assertNoMatch: "relation type=restriction restriction=no_left_turn";
+  assertNoMatch: "relation type=restriction restriction:hgv=no_left_turn";
+}
+
 /* #15208, #16242 */
 relation[type=route][route=mtb    ] > way[bicycle=no],