(1) If:
(a) an entity is liable under subsection 9 (2) to repay an amount; and
(b) the whole or a part of the amount remains unpaid after the time by which the amount is due to be paid;
the entity is liable to pay general interest charge on the unpaid amount .
(2) An entity who is liable under this section to pay general interest charge on an unpaid amount is liable to pay the charge for each day in the period that:
(a) started at the beginning of the day by which the unpaid 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 unpaid amount;
(ii) general interest charge on any of the unpaid amount .