(1) Any person aggrieved by any decision or order made under this Act may prefer an appeal, -
(a) where the decision or order has been made by the Chief Controller or Additional Chief Controller, to the Central Government;
(b) Where the decision or order has been made by any officer below the rank of the Additional Chief Controller, to the Chief Controller or where he so directs, to the Additional Chief Controller,
within a period of forty-five days from the date on which the order is served on such person :
Provided that the Appellate authority may, if it is satisfied that the appellant was prevented by sufficient cause from preferring the appeal within the aforesaid period of forty-five days, allow such appeal to be preferred within a further period of forty-five days:
Provided further that in the case of an appeal against an order imposing a penalty, no such appeal shall be entertained unless the amount of the penalty has been deposited by the appellant:
Provided also that, where the Appellate authority is of opinion that the deposit to be made will cause undue hardship to the appellant, it may, at its discretion, dispense with such deposit either unconditionally or