(1) An executing police officer must, before anyone enters premises under a search warrant—
(a) announce that the person is authorised to enter the premises; and
(b) give anyone at the premises an opportunity to allow entry to the premises; and
(c) if the occupier of the premises, or someone else who apparently represents the occupier, is present at the premises—identify themself to that person.
(2) The executing police officer is not required to comply with subsection (1) if the police officer believes on reasonable grounds that immediate entry to the premises is required to ensure—
(a) the safety of anyone (including any police officer or person assisting); or
(b) that the effective execution of the warrant is not frustrated.