Part 2: Lawful interception of communications Chapter 1: Interception and examination with a warrant Section 15: Warrants that may be issued under this Chapter
Subsection (1) explains that there are three types of warrants which can be issued under this chapter: a targeted interception warrant, a targeted examination warrant and a mutual assistance warrant.
	Subsection (2) describes a targeted interception warrant and provides that such an interception warrant may authorise any activity for obtaining secondary data. Subsection (3) explains that a targeted examination warrant authorises the examination of material that has been collected under a bulk interception warrant. A targeted examination warrant must be sought whenever a member of an intelligence service wishes to look at material which relates to a person who is known to be in the British Islands and when he or she believes that it is necessary and proportionate to select the content of that person’s communications for examination.
	Subsection (4) describes a mutual assistance warrant. Such a warrant gives effect to an incoming request, or authorises an outgoing request, for assistance in relation to the interception of communications. Such a request may be made in accordance with the EU Mutual Legal Assistance Convention, or another international agreement designated in regulations made by the Secretary of State.
	Subsection (5) confirms that a warrant authorises any conduct necessary to fulfill what is authorised or required by the warrant, including the interception of communications not specifically described in the warrant, or the obtaining of secondary data from such communications. For example, a warrant can authorise the interception of communications of other individuals who may use the phone line or email account subject to a warrant. A warrant needs to be able to authorise this conduct because it would not be possible to intercept only those communications belonging to the person that is subject to the interception warrant where other people use the same device.