Surveillance Devices Act 1999

A retrieval warrant may be revoked at any time before the expiration of the period of validity specified in it by—

a Supreme Court judge, if a Supreme Court judge issued the warrant; or

a magistrate, if a magistrate issued the warrant.

A judge or magistrate who revokes a warrant must give notice of the revocation to the chief officer of the law enforcement agency of which the law enforcement officer to whom the warrant was issued is a member.

If the chief officer of a law enforcement agency is satisfied that the grounds for issue of a retrieval warrant to a law enforcement officer of the agency no longer exist, the chief officer must, by instrument in writing, revoke the warrant.

If the law enforcement officer to whom a retrieval warrant has been issued, or who is primarily responsible for executing a retrieval warrant, believes that the grounds for issue of the warrant no longer exist, he or she must inform the chief officer of the law enforcement agency immediately.

Notice of the revocation of a retrieval warrant must be given to a Public Interest Monitor in accordance with the regulations under the Public Interest Monitor Act 2011.