(1) Part 4 - 25 in Schedule 1 to the Taxation Administration Act 1953 has effect as if:
(a) any compulsory repayment amount of a person were income tax payable by the person in respect of the income year in respect of which the assessment of that debt was made; and
(b) this Part were an income tax law.
(2) Subsection (1) does not have the effect of making a person liable to a penalty for any act or omission that happened before the commencement of this subsection.