4. Proving a debt
(1) In Insolvency Proceedings (other than a members' voluntary winding-up), a person claiming to be a creditor of the Company and wishing to recover his debt in whole or in part must submit his claim in writing to the Office-holder unless —
(a) the Court orders otherwise;
(b) in a winding-up immediately preceded by an administration, the creditor has already proved in the administration; or
(c) in an administration immediately preceded by a winding-up, the creditor has already proved in the winding-up.
(2) A creditor who claims is referred to as "proving" for his debt and a document by which he seeks to establish his claim is his "proof".
(3) In a members' voluntary winding-up the Office-holder may require proof to be delivered to the liquidator.