22.—(1) The holder of a discharge book shall produce it on demand at any time—
(a)to a superintendent, a proper officer, the Registrar General of Shipping and Seamen or an official of the Merchant Navy Establishment Administration;
(b)to his employer and to the master of the ship in which the holder is employed; and
(c)to any other person authorised by regulation 20 to make an entry in it, for the purpose of making that entry.
(2) The holder of a discharge book who fails to produce it when required to do so in accordance with this regulation shall be guilty of an offence.
(3) A person to whom a discharge book is produced shall return it to the holder as soon as practical after the entry has been made or any inspection of it.