(1)Subject to the provisions of this section, any notice or other document required or authorised to be served or given under this Act may be served or given either—
(a)by delivering it to the person on whom it is to be served or to whom it is be given, or
(b)by leaving it at the usual or last known place of abode of that person, or, in a case where an address for service has been given, at that address, or
(c)by sending it in a prepaid registered letter, or by the recorded delivery service, addressed to that person at his usual or last known place of abode, or, in a case where an address for service has been given, at that address, or
(d)in the case of a person on whom service is required by this Act to be made as being a person appearing from the valuation roll to have an interest in land, by sending it in a prepaid registered letter, or by the recorded delivery service, addressed to that person at his address as entered in the valuation roll, or
(e)in the case of an incorporated company or body, by delivering it to the secretary or clerk of the company or body at their registered or principal office, or sending it in a prepaid registered letter, or by the recorded delivery service, addressed to the secretary or clerk of the company or body at that office.
(2)Where the notice or document is required or authorised to be served on or given to any person as having an interest in premises, and the name, or, as the case may be, the address, of that person cannot be ascertained after reasonable inquiry, or where the notice or document is required or authorised to be served on any person as an occupier of premises, the notice or document shall be deemed to be duly served if—
(a)being addressed to him by the description of “the owner” or “the occupier”, as the case may be, of the premises (describing them), it is delivered, left or sent in the manner specified in subsection (1)(a), (b) or (c) above, or
(b)being addressed to him either by name or in accordance with paragraph (a) of this subsection, and marked in such manner as may be prescribed for securing that it shall be plainly identifiable as a communication of importance, it is sent to the premises in a prepaid registered letter or by the recorded delivery service and is not returned to the authority sending it, or is delivered to some person on those premises, or is affixed conspicuously to some object on those premises.
(3)Where the notice or other document is required to be served on or given to all persons having interests in, or being occupiers of, premises comprised in any land, and it appears to the authority required to serve or give the notice or other document that any part of that land is unoccupied, the notice or documents shall be deemed to be duly served on all persons having interests in, and on any occupiers of, premises comprised in that part of the land (other than an owner who in accordance with the provisions of this Act in that behalf has given to that authority an address for the service of the notice on him) if, being addressed to “the owners and any occupiers” of that part of the land (describing it) and marked as mentioned in subsection (2)(b) above, it is affixed conspicuously to some object on the land.
(4)Where a notice or other document has been served or given in accordance with the foregoing provisions of this section, it shall be deemed to have been served or given—
(a)in the case of delivery, at the time of such delivery,
(b)in any other case, on the expiry of 48 hours after the time when it was actually served or given.