Production of additional evidence in Appellate Court

(1) The parties to an appeal shall not be entitled to produce additional evidence, whether oral or documentary, in the Appellate Court. But if—

(a) the Court from whose decree the appeal is preferred has refused to admit evidence which ought to have been admitted, or

(b) the Appellate Court requires any document to be produced or any witness to be examined to enable it to pronounce judgment, or for any other substantial cause,

the Appellate Court may allow such evidence or document to be produced, or witness to be examined.

(2) Wherever additional evidence is allowed to be produced by an Appellate Court, the Court shall record the reason for its admission.