(1)The Secretary of State may, on an application made by or on behalf of the Chief of Defence Intelligence, issue a targeted equipment interference warrant if—
(a)the Secretary of State considers that the warrant is necessary in the interests of national security,
(b)the Secretary of State considers that the conduct authorised by the warrant is proportionate to what is sought to be achieved by that conduct,
(c)the Secretary of State considers that satisfactory arrangements made for the purposes of sections 129 and 130 (safeguards relating to disclosure etc.) are in force in relation to the warrant, and
(d)except where the Secretary of State considers that there is an urgent need to issue the warrant, the decision to issue the warrant has been approved by a Judicial Commissioner.
(2)The fact that the information which would be obtained under a warrant relates to the activities in the British Islands of a trade union is not, of itself, sufficient to establish that the warrant is necessary as mentioned in subsection (1)(a).
(3)An application for the issue of a warrant under this section may only be made on behalf of the Chief of Defence Intelligence by a person holding office under the Crown.