(1) A person's repayable debt for an * income year is:
(a) the person's * accumulated HELP debt referred to in paragraph 154 - 1(1)(b) in relation to that income year; or
(b) if one or more amounts:
(i) have been paid in reduction of that debt; or
(ii) have been assessed under section 154 - 35 to be payable in respect of that debt;
the amount (if any) remaining after deducting from that debt the amount, or sum of the amounts, so paid or assessed to be payable.
(2) A reference in paragraph (1)(b) to an amount assessed to be payable is, if the amount has been increased or reduced by an amendment of the relevant assessment, a reference to the increased amount or the reduced amount.