An authorised officer may--
(a) enter premises, and
(b) search the premises for any property-tracking document in relation to a serious offence, and
(c) seize any document found in the course of the search that the authorised officer believes, on reasonable grounds, to be a property-tracking document in relation to a serious offence,but only if the entry, search or seizure is made--
(d) with the consent of the occupier of the premises, or
(e) under a warrant issued under section 67.