Part 2: Lawful interception of communications Chapter 1: Interception and examination with a warrant Section 37: Notification of major modifications
A Judicial Commissioner must be notified as soon as is reasonably practicable of a major modification and the reason for it. This notification requirement does not apply in circumstances where the Judicial Commissioner is required to approve the modification before it has effect, such as where it relates to Members of Parliament, legally privileged communications, confidential journalistic material or the identification of a journalist’s source. It also does not apply to urgent modifications where a different procedure applies (see section 38).
	Where a major modification is made by a senior official, the Secretary of State or, in the case of a warrant issued by the Scottish Ministers, a member of the Scottish Government must be informed.