s 13 Refund of duty or other charges overpaid
It shall be lawful for the Director General, if it is proved to his satisfaction that any money has been overpaid or erroneously paid as excise duties or as warehouse rent or as any other charges under this Act, to order the refund of the money so overpaid or erroneously paid: Provided thatβ (a) no such refund shall be allowed unless a claim in respect of the money overpaid or erroneously paid is made in writing to the Director General within one year after the over-payment or erroneous payment was made; or (b) in the case where any excise duty has been paid under protest under section 8A, no claim for refund shall be allowed unless such claim is made in the prescribed form within one year after the decision on classification or valuation is made known to the claimant.