I was wondering about the powers issued to police under a search warrant. If police have a warrant to search a premises under the controlled substances act 1984 (SA), I understand that they are able to search people on the premises who aren't listed on the warrant, provided there is suspicion of possessing a controlled substance or evidence. However in the Crimes Act 1914 section 3H (3), it dictates that any person searched must be shown a copy of the warrant. If during the search of the premises and subsequent personal searches, no warrant is produced to anyone at the premises, what legal grounds does a person have to dispute any charges?