(1) Notwithstanding anything contained in any judgment, decree, order or direction of any court, Appellate Tribunal or any authority or in any other provision of this Act or the rules made thereunder, the person, who is liable to pay duty in accordance with the provisions of section 28, shall, in addition to such duty, be liable to pay interest, if any, at the rate fixed under sub-section (2), whether such payment is made voluntarily or after determination of the duty under that section.

(2) Interest at such rate not below ten per cent. and not exceeding thirty-six per cent. per annum, as the Central Government may, by notification in the Official Gazette, fix, shall be paid by the person liable to pay duty in terms of section 28 and such interest shall be calculated from the first day of the month succeeding the month in which the duty ought to have been paid or from the date of such erroneous refund, as the case may be, up to the date of payment of such duty.

(3) Notwithstanding anything contained in sub-section (1), no interest shall be payable where,-

(a) the duty becomes payable consequent to the issue of an order, instruction or direction by the Board under section 151A; and

(b) such amount of duty is voluntarily paid in full, within forty-five days from the date of issue of such order, instruction or direction, without reserving any right to appeal against the said payment at any subsequent stage of such payment.