diff --git a/identifiers/country-ca.csv b/identifiers/country-ca.csv
index 8edabbad..0919a476 100644
--- a/identifiers/country-ca.csv
+++ b/identifiers/country-ca.csv
@@ -4836,13 +4836,13 @@ ocd-division/country:ca/csd:3515037,North Kawartha,,,,,TP,,North Kawartha,,Towns
 ocd-division/country:ca/csd:3515044,Trent Lakes,,,,,MU,,Trent Lakes,,Municipality of Trent Lakes,ocd-division/country:ca/cd:3515,,,,
 ocd-division/country:ca/csd:3516010,Kawartha Lakes,,,,,CY,,Kawartha Lakes,,City of Kawartha Lakes,,,,,
 ocd-division/country:ca/csd:3516010/ward:1,Ward 1,,,,,,,,,,,,,,
-ocd-division/country:ca/csd:3516010/ward:10,Ward 10,,,,,,,,,,,,,,
-ocd-division/country:ca/csd:3516010/ward:11,Ward 11,,,,,,,,,,,,,,
-ocd-division/country:ca/csd:3516010/ward:12,Ward 12,,,,,,,,,,,,,,
-ocd-division/country:ca/csd:3516010/ward:13,Ward 13,,,,,,,,,,,,,,
-ocd-division/country:ca/csd:3516010/ward:14,Ward 14,,,,,,,,,,,,,,
-ocd-division/country:ca/csd:3516010/ward:15,Ward 15,,,,,,,,,,,,,,
-ocd-division/country:ca/csd:3516010/ward:16,Ward 16,,,,,,,,,,,,,,
+ocd-division/country:ca/csd:3516010/ward:10,Ward 10,,2018-12-01,,,,,,,,,,,,
+ocd-division/country:ca/csd:3516010/ward:11,Ward 11,,2018-12-01,,,,,,,,,,,,
+ocd-division/country:ca/csd:3516010/ward:12,Ward 12,,2018-12-01,,,,,,,,,,,,
+ocd-division/country:ca/csd:3516010/ward:13,Ward 13,,2018-12-01,,,,,,,,,,,,
+ocd-division/country:ca/csd:3516010/ward:14,Ward 14,,2018-12-01,,,,,,,,,,,,
+ocd-division/country:ca/csd:3516010/ward:15,Ward 15,,2018-12-01,,,,,,,,,,,,
+ocd-division/country:ca/csd:3516010/ward:16,Ward 16,,2018-12-01,,,,,,,,,,,,
 ocd-division/country:ca/csd:3516010/ward:2,Ward 2,,,,,,,,,,,,,,
 ocd-division/country:ca/csd:3516010/ward:3,Ward 3,,,,,,,,,,,,,,
 ocd-division/country:ca/csd:3516010/ward:4,Ward 4,,,,,,,,,,,,,,
@@ -4850,7 +4850,7 @@ ocd-division/country:ca/csd:3516010/ward:5,Ward 5,,,,,,,,,,,,,,
 ocd-division/country:ca/csd:3516010/ward:6,Ward 6,,,,,,,,,,,,,,
 ocd-division/country:ca/csd:3516010/ward:7,Ward 7,,,,,,,,,,,,,,
 ocd-division/country:ca/csd:3516010/ward:8,Ward 8,,,,,,,,,,,,,,
-ocd-division/country:ca/csd:3516010/ward:9,Ward 9,,,,,,,,,,,,,,
+ocd-division/country:ca/csd:3516010/ward:9,Ward 9,,2018-12-01,,,,,,,,,,,,
 ocd-division/country:ca/csd:3518001,Pickering,,,,,CY,,Pickering,,City of Pickering,ocd-division/country:ca/cd:3518,,,,
 ocd-division/country:ca/csd:3518001/ward:1,Ward 1,,,,,,,,,,,,,,
 ocd-division/country:ca/csd:3518001/ward:2,Ward 2,,,,,,,,,,,,,,
diff --git a/identifiers/country-ca/ca_municipal_subdivisions.csv b/identifiers/country-ca/ca_municipal_subdivisions.csv
index 6c807e57..6d4e8820 100644
--- a/identifiers/country-ca/ca_municipal_subdivisions.csv
+++ b/identifiers/country-ca/ca_municipal_subdivisions.csv
@@ -2325,14 +2325,6 @@ ocd-division/country:ca/csd:3516010/ward:5,Ward 5,
 ocd-division/country:ca/csd:3516010/ward:6,Ward 6,
 ocd-division/country:ca/csd:3516010/ward:7,Ward 7,
 ocd-division/country:ca/csd:3516010/ward:8,Ward 8,
-ocd-division/country:ca/csd:3516010/ward:9,Ward 9,
-ocd-division/country:ca/csd:3516010/ward:10,Ward 10,
-ocd-division/country:ca/csd:3516010/ward:11,Ward 11,
-ocd-division/country:ca/csd:3516010/ward:12,Ward 12,
-ocd-division/country:ca/csd:3516010/ward:13,Ward 13,
-ocd-division/country:ca/csd:3516010/ward:14,Ward 14,
-ocd-division/country:ca/csd:3516010/ward:15,Ward 15,
-ocd-division/country:ca/csd:3516010/ward:16,Ward 16,
 ocd-division/country:ca/csd:3518001/ward:1,Ward 1,
 ocd-division/country:ca/csd:3518001/ward:2,Ward 2,
 ocd-division/country:ca/csd:3518001/ward:3,Ward 3,
diff --git a/identifiers/country-ca/ca_municipal_subdivisions_invalid.csv b/identifiers/country-ca/ca_municipal_subdivisions_invalid.csv
index 8899ea75..8119bae1 100644
--- a/identifiers/country-ca/ca_municipal_subdivisions_invalid.csv
+++ b/identifiers/country-ca/ca_municipal_subdivisions_invalid.csv
@@ -11,3 +11,11 @@ ocd-division/country:ca/csd:4811061/ward:9,Ward 9,2020-12-06
 ocd-division/country:ca/csd:4811061/ward:10,Ward 10,2020-12-06
 ocd-division/country:ca/csd:4811061/ward:11,Ward 11,2020-12-06
 ocd-division/country:ca/csd:4811061/ward:12,Ward 12,2020-12-06
+ocd-division/country:ca/csd:3516010/ward:9,Ward 9,2018-12-01
+ocd-division/country:ca/csd:3516010/ward:10,Ward 10,2018-12-01
+ocd-division/country:ca/csd:3516010/ward:11,Ward 11,2018-12-01
+ocd-division/country:ca/csd:3516010/ward:12,Ward 12,2018-12-01
+ocd-division/country:ca/csd:3516010/ward:13,Ward 13,2018-12-01
+ocd-division/country:ca/csd:3516010/ward:14,Ward 14,2018-12-01
+ocd-division/country:ca/csd:3516010/ward:15,Ward 15,2018-12-01
+ocd-division/country:ca/csd:3516010/ward:16,Ward 16,2018-12-01