diff --git a/addressfield.administrative_areas.inc b/addressfield.administrative_areas.inc
index 88343de..e6df046 100644
--- a/addressfield.administrative_areas.inc
+++ b/addressfield.administrative_areas.inc
@@ -11,7 +11,24 @@
  *   NULL if not found.
  */
 function addressfield_get_administrative_areas($country_code) {
-  $administrative_areas = array();
+  // Get the default administrative areas.
+  $administrative_areas = _addressfield_get_administrative_areas_defaults();
+
+  // Allow other modules to alter the administrative areas.
+  drupal_alter('addressfield_administrative_areas', $administrative_areas);
+
+  return isset($administrative_areas[$country_code]) ? $administrative_areas[$country_code] : null;
+}
+
+/**
+ * Helper to load the default administrative areas.
+ */
+function _addressfield_get_administrative_areas_defaults() {
+  $administrative_areas = &drupal_static(__FUNCTION__, array());
+  if ($administrative_areas) {
+    return $administrative_areas;
+  }
+
   $administrative_areas['AE'] = array(
     'AZ' => t('Abu Dhabi'),
     'FU' => t('Fujairah'),
@@ -536,20 +553,20 @@ function addressfield_get_administrative_areas($country_code) {
     'VV' => t('Vibo Valentia'),
   );
   $administrative_areas['JM'] = array(
-    '13' => 'Clarendon',
-    '09' => 'Hanover',
-    '01' => 'Kingston',
-    '12' => 'Manchester',
-    '04' => 'Portland',
-    '02' => 'St. Andrew',
-    '06' => 'St. Ann',
-    '14' => 'St. Catherine',
-    '11' => 'St. Elizabeth',
-    '08' => 'St. James',
-    '05' => 'St. Mary',
-    '03' => 'St. Thomas',
-    '07' => 'Trelawny',
-    '10' => 'Westmoreland',
+    '13' => t('Clarendon'),
+    '09' => t('Hanover'),
+    '01' => t('Kingston'),
+    '12' => t('Manchester'),
+    '04' => t('Portland'),
+    '02' => t('St. Andrew'),
+    '06' => t('St. Ann'),
+    '14' => t('St. Catherine'),
+    '11' => t('St. Elizabeth'),
+    '08' => t('St. James'),
+    '05' => t('St. Mary'),
+    '03' => t('St. Thomas'),
+    '07' => t('Trelawny'),
+    '10' => t('Westmoreland'),
   );
   $administrative_areas['JP'] = array(
     '01' => t('Hokkaido'),
@@ -1030,8 +1047,5 @@ function addressfield_get_administrative_areas($country_code) {
     'V' => t('Zulia'),
   );
 
-  // Allow other modules to alter the administrative areas.
-  drupal_alter('addressfield_administrative_areas', $administrative_areas);
-
-  return isset($administrative_areas[$country_code]) ? $administrative_areas[$country_code] : null;
+  return $administrative_areas;
 }