(1)
The appellant shall not be allowed to produce before the Appellate Authority or the Appellate Tribunal any evidence, whether oral or documentary, other than the evidence produced by him during the course of the proceedings before the adjudicating authority or, as the case may be, the Appellate Authority except in the following circumstances, namely:-
(2)
No evidence shall be admitted under sub-rule (1) unless the Appellate Authority or the Appellate Tribunal records in writing the reasons for its admission.
(3)
The Appellate Authority or the Appellate Tribunal shall not take any evidence produced under sub-rule (1) unless the adjudicating authority or an officer authorised in this behalf by the said authority has been allowed a reasonable opportunity -
(4)
Nothing contained in this rule shall affect the power of the Appellate Authority or the Appellate Tribunal to direct the production of any document, or the examination of any witness, to enable it to dispose of the appeal.