Index: trunk/data/validator/combinations.mapcss
===================================================================
--- trunk/data/validator/combinations.mapcss	(revision 13083)
+++ trunk/data/validator/combinations.mapcss	(revision 13084)
@@ -116,4 +116,6 @@
 
 /* {0.tag} without {1.key} (warning level) */
+way[boundary=administrative][!admin_level],
+relation[boundary=administrative][!admin_level],
 relation[route=bicycle][!network][type=route],
 relation[route=hiking][!network][type=route],
Index: trunk/styles/standard/elemstyles.mapcss
===================================================================
--- trunk/styles/standard/elemstyles.mapcss	(revision 13083)
+++ trunk/styles/standard/elemstyles.mapcss	(revision 13084)
@@ -4415,4 +4415,5 @@
 way[boundary=protected_area]::core_boundary,
 way[boundary=administrative]::core_boundary,
+relation[boundary=administrative] > way::core_boundary,
 way[boundary=postal_code]::core_boundary,
 way[boundary=political]::core_boundary,
@@ -4425,23 +4426,10 @@
     dashes: 9,9;
 }
-way[boundary=administrative][admin_level=9]::core_boundary,
-relation[boundary=administrative][admin_level=9] > way::core_boundary,
-way[boundary=administrative][admin_level=10]::core_boundary,
-relation[boundary=administrative][admin_level=10] > way::core_boundary {
-    z-index: 2;
-    modifier: false;
-    width: 1;
-    color: boundary#FF6600;
-    dashes: 9,9;
-}
+/* admin_level >=9 use the default width of 1 defined above */
 way[boundary=administrative][admin_level=7]::core_boundary,
 relation[boundary=administrative][admin_level=7] > way::core_boundary,
 way[boundary=administrative][admin_level=8]::core_boundary,
 relation[boundary=administrative][admin_level=8] > way::core_boundary {
-    z-index: 2;
-    modifier: false;
     width: 2;
-    color: boundary#FF6600;
-    dashes: 9,9;
 }
 way[boundary=administrative][admin_level=5]::core_boundary,
@@ -4449,9 +4437,5 @@
 way[boundary=administrative][admin_level=6]::core_boundary,
 relation[boundary=administrative][admin_level=6] > way::core_boundary {
-    z-index: 2;
-    modifier: false;
     width: 3;
-    color: boundary#FF6600;
-    dashes: 9,9;
 }
 way[boundary=administrative][admin_level=3]::core_boundary,
@@ -4459,9 +4443,5 @@
 way[boundary=administrative][admin_level=4]::core_boundary,
 relation[boundary=administrative][admin_level=4] > way::core_boundary {
-    z-index: 2;
-    modifier: false;
     width: 4;
-    color: boundary#FF6600;
-    dashes: 9,9;
 }
 way[boundary=administrative][admin_level=1]::core_boundary,
@@ -4469,9 +4449,5 @@
 way[boundary=administrative][admin_level=2]::core_boundary,
 relation[boundary=administrative][admin_level=2] > way::core_boundary {
-    z-index: 2;
-    modifier: false;
     width: 5;
-    color: boundary#FF6600;
-    dashes: 9,9;
 }
 node[boundary=national],