5.—(1) Where the Department receives—
(a)a notice sent to it under Article 4(2)(a) of particulars required to be endorsed on the counterpart of a person’s licence, or
(b)a person’s licence and its counterpart sent to it in accordance with Article 4(2)(b) or (4),
the Department shall by notice served on that person revoke the licence.
(2) A revocation under paragraph (1) shall have effect from a date specified in the notice of revocation which shall not be earlier than the date of service of that notice.