3.—(1) A notice mentioned in regulation 2 may be served by being—
(a)delivered personally to the person;
(b)sent to the person’s address by—
(i)a registered post service (as defined in section 125(1) of the Postal Services Act 2000(1); or
(ii)a postal service which provides for the delivery of the notice to be recorded; or
(c)sent to the person’s email address as provided in the person’s application for registration as a letting agent.
(2) Where a notice is served as mentioned in paragraph (1)(b) or (c), it is to be taken to have been received 48 hours after it is sent unless the contrary is shown.