If any of the Excise duty remains unpaid after it is due under subsection 66(6), the person liable to pay the duty is liable to pay the general interest charge (within the meaning of the Taxation Administration Act 1953 ) on the unpaid amount of the Excise duty for each day in the period that:
(a) started at the beginning of the day by which the amount was due to be paid; and
(b) finishes at the end of the last day, at the end of which, any of the following remains unpaid:
(i) the amount;
(ii) general interest charge on any of the amount.
Note: The general interest charge is worked out under Part IIA of the Taxation Administration Act 1953 .