Overpayment or underpayment of dues and charges

Where the amount paid in respect of any dues and charges is found to be incorrect then, if such amount is, (a) overpaid, the person who overpaid any such amount then is entitled to a refund of the amount so overpaid; (b) underpaid, the amount of such underpayment may be collected from the person who made such payments, Provided that, notwithstanding anything contained in any enactment, such overpayment or underpayment shall not be refunded or collected, as the case may be, unless notice in writing containing such particulars as may reasonably be necessary is given, (a) by the person claiming such overpayment to the Ports Commissioner or a port manager; or (b) by the Ports Commissioner or a port manager to the whom the underpayment is claimed, 60 within six months after the goods were accepted or the services rendered, as the case may be, by the Authority, so however, that where such underpayment is caused by information or description subsequently found to be incorrect, such period of six months shall commence from the date of discovery by the Ports Commissioner or a port manager of the correct information or description.