Deferred payment of import duty permitted for notified importers; unpaid duty attracts interest at government fixed annual rates. The amendment allows specified classes of importers to make deferred payment of import duty as permitted by Government notification and rules. If the importer fails to pay duty within two days (excluding holidays) from the bill of entry being returned, or from the deferred payment due date prescribed by rules, interest accrues on the unpaid or short-paid duty until payment at a rate fixed by notification not below ten per cent and not exceeding thirty-six per cent per annum.