31.—(1) A person who has in the person's possession or power a document, or information in any form, relating to any matter within a commission's terms of reference shall preserve that document or information—

( a) until the commission is dissolved under section 43(1) , or

( b) if the commission is dissolved under section 44(1) , until the tribunal established to inquire into the matter that was within the commission's terms of reference has completed its inquiry.

(2) A person who contravenes subsection (1) is guilty of an offence.