Appeal on question of law: SAT orders may be challenged within the prescribed period with possible extension for sufficient cause. Any person aggrieved by a decision or order of the Securities Appellate Tribunal may file an appeal to the Supreme Court on a question of law within sixty days from communication of the Tribunal's decision; the Supreme Court may, if satisfied of sufficient cause preventing timely filing, allow a further period not exceeding sixty days. The provision narrows appellate review to legal questions and replaces the earlier route of appeal to a High Court on questions of fact or law.