/**
  * Disable the validator when the action clicked is to use a different shipping address
  * or use the member shipping address.
  */
 function beforeProcessing()
 {
     if (isset($_REQUEST['action_useDifferentShippingAddress']) || isset($_REQUEST['action_useMemberShippingAddress'])) {
         return true;
     } else {
         return parent::beforeProcessing();
     }
 }