(1)The Secretary of State, or a senior official acting on behalf of the Secretary of State, may cancel a class BPD warrant or a specific BPD warrant at any time.
(2)If the Secretary of State, or a senior official acting on behalf of the Secretary of State, considers that any of the cancellation conditions are met in relation to a class BPD warrant or a specific BPD warrant, the person must cancel the warrant.
(3)The cancellation conditions are—
(a)that the warrant is no longer necessary on any grounds falling within section 204(3)(a) or (as the case may be) section 205(6)(a);
(b)that the conduct authorised by the warrant is no longer proportionate to what is sought to be achieved by that conduct;
(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, that the examination of bulk personal datasets of that class or (as the case may be) of the bulk personal dataset is no longer necessary for any of the specified operational purposes (see section 212).