(1) Where, on the determination of an appeal made under section 67(2) against an assessment of tax, the amount of tax payable by a person is in excess of the amount of tax that the person paid in respect of the assessment before the making of the appeal, the excess shall be due and payable on the same date as the tax charged by the assessment is due and payable.

(2) Notwithstanding subsection (1), where the amount of tax that a person paid before the making of an appeal is not less than 90 per cent of the amount of tax found to be payable on the determination of the appeal, the excess referred to in subsection (1) shall be due and payable not later than one month from the date of the determination of the appeal.