Section 89Approval of retention notices by Judicial Commissioners

(1) In deciding whether to approve a decision to give a retention notice, a Judicial Commissioner must review the Secretary of State's conclusions as to whether the requirement to be imposed by the notice to retain relevant communications data is necessary and proportionate for one or more of the purposes falling within [^F1sub-paragraphs (i) to (vi) of section 87(1)(a)].

(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 give a retention notice, 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 give a retention notice, the Secretary of State may ask the Investigatory Powers Commissioner to decide whether to approve the decision to give the notice.