63(1) This section applies where a disclosure notice has been given under section 62.
63(2) An authorised person may–
(a)take copies of or extracts from any documents produced in compliance with the notice, and
(b)require the person producing them to provide an explanation of any of them.
63(3) Documents so produced may be retained for so long as the Investigating Authority considers that it is necessary to retain them (rather than copies of them) in connection with the investigation for the purposes of which the disclosure notice was given.