Revisional Authority powers to revisit subordinate tax orders, stay them and modify or annul when prejudicial to revenue. The Revisional Authority may, on motion or information, examine records and, if a subordinate officer's decision is erroneous or prejudicial to revenue, stay its operation, inquire further, hear the person concerned and enhance, modify or annul the decision. Revision is barred where specified appeals exist, limitation periods have not expired or have lapsed, the order was earlier revised, or the order was itself made under revisional powers; certain interlocutory periods and judicial stays are excluded from limitation. Orders in revision are final and binding subject to other appellate provisions. 'Record' and 'decision' are defined for these purposes.