(1)  A defendant may show cause against an application for summary judgment by affidavit or otherwise.

(2)  Unless a judge otherwise directs, an affidavit may contain statements of information or belief with the sources and grounds of those statements.

(3)  On the hearing of an application, the judge may order a defendant showing cause or, if the defendant is a corporation, any officer of the corporation –

(a) to produce any document; or

(b) to attend and be examined on oath if it appears to the judge that it is desirable because of special circumstances.

(4)  A judge is to grant leave either unconditionally or on any terms to defend the claim or a part of the claim if –

(a) there is an issue or question in dispute that ought to be tried; or

(b) for some other reason there ought to be a trial of the claim or a part of the claim.