This section sets out the circumstances under which a bulk interception warrant must be cancelled.
	Where the Secretary of State or a senior official decides the warrant is no longer necessary or proportionate, or that the examination of intercepted content and secondary data collected is no longer necessary for any of the operational purposes specified on the warrant, he or she must cancel it. A warrant may be cancelled by the Secretary of State or a senior official at any time.
Part 6: Bulk warrants Chapter 1: Bulk interception warrants Section 148: Cancellation of warrants