(1)In deciding whether to approve a decision to issue a class BPD warrant or a specific BPD warrant, a Judicial Commissioner must review the Secretary of State’s conclusions as to the following matters—
(a)whether the warrant is necessary on grounds falling within section 204(3)(a) or (as the case may be) section 205(6)(a),
(b)whether the conduct that would be authorised by the warrant is proportionate to what is sought to be achieved by that conduct, and
(c)where the warrant authorises examination of bulk personal datasets of a class described in the warrant or (as the case may be) of a bulk personal dataset described in the warrant, whether—
(i)each of the specified operational purposes (see section 212) is a purpose for which the examination of bulk personal datasets of that class or (as the case may be) the bulk personal dataset is or may be necessary, and
(ii)the examination of bulk personal datasets of that class or (as the case may be) the bulk personal dataset is necessary as mentioned in section 204(3)(c)(ii) or (as the case may be) section 205(6)(c)(ii).
(2)In doing so, the Judicial Commissioner must—
(a)apply the same principles as would be applied by a court on an application for judicial review, and
(b)consider the matters referred to in subsection (1) with a sufficient degree of care as to ensure that the Judicial Commissioner complies with the duties imposed by section 2 (general duties in relation to privacy).
(3)Where a Judicial Commissioner refuses to approve a decision to issue a class BPD warrant or a specific BPD warrant, the Judicial Commissioner must give the Secretary of State written reasons for the refusal.
(4)Where a Judicial Commissioner, other than the Investigatory Powers Commissioner, refuses to approve a decision to issue a class BPD warrant or a specific BPD warrant, the Secretary of State may ask the Investigatory Powers Commissioner to decide whether to approve the decision to issue the warrant.