19.—(1) A notice required or authorised to be given to a person (other than a traffic commissioner) under the 1981 Act and these Regulations may be effected by—
(a)delivering to him at his proper address; or
(b)sending it to him by post to his proper address; or
(c)transmitting it to him by fax if he has indicated expressly in writing or by providing a fax number on his letter heading that he will accept transmission by fax.
(2) Any such document may—
(a)in the case of a body corporate, be sent to the secretary or clerk of that body;
(b)in the case of a partnership, be sent to any partner.
(3) For the purposes of this paragraph and section 7 of the Interpretation Act 1978(1), the proper address of any person is his last known address (whether of his residence or a place where he carries on business or is employed) and in the case of a body corporate, its secretary or its clerk, the address of its registered or principal office in the United Kingdom.
(4) If a notice under section 49A of the 1981 Act is sent by registered post or the recorded delivery service addressed to the applicant or (as the case may be) the licence holder at his proper address, the notice shall, for the purposes of that section, be deemed to have been given when it would have been delivered in the ordinary course of post, notwithstanding that—
(a)the notice was returned as undelivered or was for any reason not received by him; or
(b)was in fact delivered or received by him at some other time,
and notwithstanding anything in section 7 of the Interpretation Act 1978.
(5) Where a person has notified the traffic commissioner of an address or a new address at which documents may be given to him for the purposes of the 1981 Act and these Regulations, that address shall also be his proper address for service for the purposes mentioned in paragraph (3) or (4) or, as the case may be, his proper address for those purposes in substitution for that previously notified.