(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 sub-section (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.