(1) Before executing a search warrant, the authorised officer named in the warrant, or a person assisting the authorised officer, must—
(a) announce that they are authorised by the warrant issued under this Act to enter the premises; and
(b) give any person at the premises an opportunity to allow that entry.
(2) However, the authorised officer, or person assisting the authorised officer, need not comply with subsection (1) if they believe on reasonable grounds that immediate entry to the premises is needed to ensure—
(a) the health or safety of any person; or
(b) that the effective execution of the warrant is not frustrated.