“23. In other words, the Tribunal has the power to require any particular fact to be proved by affidavit, or it may order the affidavit of any witness may be read at the hearing. While passing such an order, it must record sufficient reasons for the same. The proviso to Rule 12(6) would certainly apply only where the Tribunal chooses to issue a direction, on its own, for any particular fact to be proved by affidavit or the affidavit of a witness being read at the hearing. The said proviso refers to the desire of an applicant or defendant for the production of a witness for crossexamination. In the setting in which the said proviso occurs, it would appear to us that once the parties have filed affidavits in support of their respective cases, it is only thereafter that the desire for a witness to be cross-examined can legitimately arise. It is at that time, if it appears to the Tribunal, that such a witness can be produced and it is necessary to do so and there is no desire to prolong the case that it shall require the witness to be present for cross-examination and in the event of his not appearing, then the affidavit shall not be taken into evidence. When the High Courts and the Supreme Court in exercise of their jurisdiction under Article