(1) Before executing a search warrant, the inspector named in the warrant or an assistant to the inspector 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 that entry.
(2) However, the inspector or an assistant to the inspector need not comply with subsection (1) if he or she believes on reasonable grounds that immediate entry to the place is needed to ensure—
(a) the safety of any person; or
(b) that the effective execution of the warrant is not frustrated.