S. 154 : Rectification of mistake-Mistake apparent from the record-Depreciation-Powers of appellate Authority-Merely because an appeal was filed before Appellate Authority or revision pending before Revisional Authority would not preclude Original Authority to rectify any mistake or error apparent from record under section 154 in respect of which either no order has been passed by Appellate/Revisional Authority or yet an order was to be passed.[S. 32, 250,251(ia),260A]