When can an appeal lie from SAT to Supreme Court as per the SEBI Act?

Section 15Z of SEBI Act Appeal to Supreme Court—Any person aggrieved by any decision or order of the Securities Appellate Tribunal may file an appeal to the Supreme Court within sixty days from the date of communication of the decision or order of the Securities Appellate Tribunal to him on any question of law arising out of such order: Provided that the Supreme Court may, if it is satisfied that the appellant was prevented by sufficient cause from filing the appeal within the said period, allow it to be filed within a further period not exceeding sixty days.