476. The Minister may, in writing, revoke an authorization granted under section 475 where(1) the registrant fails to comply with any condition attached thereto or any provision of this Title;
(2) the Minister considers that the authorization is no longer required for the purposes for which it was originally granted, or for the purposes of this Title;
(3) the Minister is no longer satisfied that the requirements of paragraphs 1 and 2 of section 475 in respect of the registrant are met; or
(4) the registrant, in writing, requests the Minister to revoke the authorization.