If, at any stage of a proceeding, it appears to the Court from evidence or from the nature or circumstances of the case or from any document filed, that some document or class of document relating to a matter in question in the proceeding may be, or may have been, in the possession, custody or control of a party, the Court may order the party:
(a) to file an affidavit stating:
(i) whether the document, or a document of that class, is or has been in the possession, custody or control of the party; and
(ii) if it has been, but is not then, in the possession, custody or control of the party--when the party parted with it and what has become of it; and
(b) to serve the affidavit on another party.