(1) Before executing a search warrant, the inspector named in the warrant must—
(a) announce that he or she is authorised by the warrant to enter the place; and
(b) give any person at the place an opportunity to allow entry to the place.
(2) The inspector need not comply with sub-section (1) if he or she believes on reasonable grounds that immediate entry to the place is required to ensure—
(a) the safety of any person; or
(b) that the effective execution of the search warrant is not frustrated.