11.—(1) Service of any order, notice, direction or of a copy thereof required or authorised by this Act or any regulations made thereunder to be served shall be deemed to have been effected —
(a)
in the case of a natural person, if sent by registered post to his last known address, or if it is affixed on a conspicuous part of the housing accommodation described in such order, notice, direction or copy; and
(b)
in the case of a company, a society, an association or other organisation or body, if sent by registered post to its postal address, its registered office in Singapore or its last known place of business in Singapore, or if it is affixed on a conspicuous part of the housing accommodation described in such order, notice, direction or copy,
and in either case service shall be deemed to be made, in the case of service by registered letter, at the time that such registered letter would in the ordinary course be delivered.
(2) Any order, notice, direction or a copy thereof required or authorised by this Act or any regulations made thereunder to be served on the owner of a housing accommodation under the executive condominium scheme shall be deemed to be properly addressed if addressed by the description of “the owner” of the housing accommodation without further name or description.