20.—(1) A notice required to be served on a person under this Order may be served by—
(a)delivery to that person personally,
(b)post to the address notified by the person to the Council or if there is no such notification to their last known address, or
(c)electronic mail, where that person so requests it.
(2) A notice served in accordance with this article is deemed, unless the contrary is shown, to have been served—
(a)in the case of service under paragraph (1)(a), on the day it was delivered,
(b)in the case of service under paragraph (1)(b), the next working day, and
(c)in the case of service under paragraph (1)(c), on the day it was sent.