(1) An authorised person must, before entering the premises under a warrant:
(a) announce that he or she is authorised to enter the premises; and
(b) give any person at the premises an opportunity to allow entry to the premises.
(2) An authorised person is not required to comply with subsection (1) if he or she believes on reasonable grounds that immediate entry to the premises is required to ensure:
(a) the safety of a person; or
(b) that the effective execution of the warrant is not frustrated.