(1) A declaration under subsection 14 (2) or (4) takes effect at the time specified in the declaration, which must not be earlier than the time the declaration is made.
(2) The Minister may, subject to this section, make more than one declaration under subsection 14 (2) or (4), but only one declaration under subsection 14 (2) may be in effect at a particular time.
(3) If:
(a) a declaration under subsection 14 (2) (the original declaration ) is in effect at a particular time; and
(b) at that time, the Minister makes another such declaration (the later declaration );
the Minister is taken, immediately before the time of effect specified in the later declaration, to have revoked the original declaration under section 17 .