The chief officer of an eligible authority must not cause a restricted record to be destroyed under section 19 unless--
(a) the chief officer has received from the secretary of the Commonwealth department written notice that the entry in the general register relating to the warrant under which the restricted record was obtained has been inspected by the Commonwealth Minister; and
(b) the chief officer first--
(i) notifies the eligible authority's inspecting entity that the chief officer intends to destroy the record; and
(ii) gives the inspecting entity the opportunity to inspect the record.