Index: resources/data/validator/numeric.mapcss
===================================================================
--- resources/data/validator/multiple.mapcss	(revision 17286)
+++ resources/data/validator/multiple.mapcss	(working copy)
@@ -7,7 +7,60 @@
 *[name =~ /.+;(.+)?/],
 *[surface =~ /.+;(.+)?/],
 *[water =~ /.+;(.+)?/] {
-    throwWarning: tr("{0} with multiple values", "{0.key}");
+  throwWarning: tr("{0} with multiple values", "{0.key}");
+}
+
+/* #19419 */
+node[/^(amenity|barrier|building(:part)?|entrance|(high|rail|water)way|leisure)$/][access =~ /^.*;.*$/],
+way[/^(amenity|building(:part)?|(high|rail|water)way|water|leisure)$/][access =~ /^.*;.*$/],
+relation[type =~ /^(boundary|multipolygon)$/][access =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/]["4wd_only" =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][agricultural =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][bdouble =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][bicycle =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][bus =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][carriage =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][disabled =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][dog =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][emergency =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][foot =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][golf_cart =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][goods =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][hazmat =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][hgv =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][horse =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][hov =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][mofa =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][moped =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][motor_vehicle =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][motorcar =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][motorcycle =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][psv =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][snowmobile =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][ski =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][taxi =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][tourist_bus =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][vehicle =~ /^.*;.*$/],
+*[/^(amenity||building(:part)?|entrance|highway|leisure)$/][wheelchair =~ /^.*;.*$/],
+*[railway][train =~ /^.*;.*$/],
+*[railway][tram =~ /^.*;.*$/],
+*[railway][subway =~ /^.*;.*$/],
+*[/^(leisure|water(way)?)$/][boat =~ /^.*;.*$/],
+*[/^(leisure|water(way)?)$/][canoe =~ /^.*;.*$/],
+*[/^(leisure|water(way)?)$/][cargo =~ /^.*;.*$/],
+*[/^(leisure|water(way)?)$/][motorboat =~ /^.*;.*$/],
+*[/^(leisure|water(way)?)$/][passenger =~ /^.*;.*$/],
+*[/^(leisure|water(way)?)$/][ship =~ /^.*;.*$/],
+*[/^(leisure|water(way)?)$/][swimming =~ /^.*;.*$/] {
+  throwWarning: tr("{0} with multiple values", "{1.key}");
+  group: tr("Multiple values in access tag");
+  suggestAlternative: tr("only one value and additional {0}", "{1.key}:conditional");
+  assertMatch:   "node barrier=block access=agricultural;forestry";
+  assertNoMatch: "node barrier=block access=agricultural";
+  assertMatch:   "way highway=trunk access=agricultural;forestry";
+  assertNoMatch: "way highway=trunk access=agricultural";
+  assertMatch:   "relation type=multipolygon water=lake access=boat;canoe";
+  assertNoMatch: "relation type=multipolygon water=lake access=boat";
 }
 
 *[source              =~ /^(;.*|.*;;.*|.*;)$/],
@@ -35,11 +88,12 @@
 *[voltage             =~ /^(;.*|.*;;.*|.*;)$/],
 *[sport               =~ /^(;.*|.*;;.*|.*;)$/],
 *[cuisine             =~ /^(;.*|.*;;.*|.*;)$/] {
-        throwWarning: tr("empty value in semicolon-separated ''{0}''", "{0.key}");
-        assertMatch: "node ref=;A1";
-        assertMatch: "node ref=A1;";
-        assertMatch: "node ref=;";
-        assertMatch: "node ref=A1;;A2";
-        assertNoMatch: "node ref=A1";
-        assertNoMatch: "node ref=A1;A2";
+  throwWarning: tr("empty value in semicolon-separated ''{0}''", "{0.key}");
+  assertMatch: "node ref=;A1";
+  assertMatch: "node ref=A1;";
+  assertMatch: "node ref=;";
+  assertMatch: "node ref=A1;;A2";
+  assertNoMatch: "node ref=A1";
+  assertNoMatch: "node ref=A1;A2";
 }
+