12.—(1) The Director may cancel or suspend any licence where the licensee has —
(a)
failed to comply with any of the conditions subject to which his licence has been issued; or
(b)
been convicted of an offence under the Act or these Rules.
(2) On the cancellation or suspension of a licence, the Director shall notify the licensee of the cancellation or suspension and in the case of a suspension, he shall specify in the notice the period of the suspension.
(3) On the receipt of a notification under paragraph (2), the licensee shall forthwith surrender his licence to the Director.
(4) Where a licence has been surrendered to the Director on its suspension in accordance with paragraph (3), the Director shall, upon the expiry of the period of the suspension, return the licence to the person to whom the same was issued if the licence has not at that time expired.