(1) If a document is produced to an authorised officer the authorised officer—
(a) may inspect the document; and
(b) may make a copy of, or take an extract from, the document; and
(c) may keep the document while it is necessary for the investigation.
(2) If the authorised officer keeps the document, the authorised officer must permit a person otherwise entitled to possession of the document to inspect, make a copy of, or take an extract from, the document at a reasonable time and place decided by the authorised officer.