Part 5: Equipment interference Section 104: Power to issue warrants to the Chief of Defence Intelligence
This section sets out the circumstances in which the Secretary of State can issue a targeted equipment interference warrant to the Chief of Defence Intelligence. Such warrants work in the same way as warrants issued to the intelligence services by the Secretary of State, with approval dependent upon consideration of necessity and proportionality. Warrants issued to the Chief of Defence Intelligence can only be issued if it is necessary in the interests of national security. Unless it is considered urgent, the decision to issue the warrant must be approved by a Judicial Commissioner.
	Subsection (2) makes it clear that it is not sufficient to establish that a warrant is necessary only on the basis that the information that would be obtained relates to trade union activity in the British Islands.