(1)  On the application of a party entitled to inspect any document under rule 390 or 391 , the Court or a judge may make an order for production of the document for inspection.

(2)  The Court or a judge, on the application of any party to a proceeding, may order any other party to permit the party applying to inspect a discoverable document.

(3)  An application under subrule (2) is to be supported by an affidavit –

(a) specifying or describing each document of which inspection is sought; and

(b) stating the belief of the deponent that each document is a discoverable document of the other party.