5. An appointed person who takes possession of any written or electronic record in the exercise of the power conferred by the warrant must—
(a)provide a list of what was taken to the former authority within a reasonable time, which must be no longer than a period of 21 days beginning on the date the record was taken; and
(b)return that record to the former authority within a period of 3 months beginning on the date on which the appointed person took possession of it, unless the former authority agrees otherwise in writing.