Where:
(a) a person (in this section called the debtor ) is liable to pay an amount to the Commonwealth under this Act; and
(b) the Commonwealth holds on behalf of the debtor:
(i) money, being compensation payable under this Act for the benefit of the debtor; or
(ii) investments acquired out of money of a kind referred to in subparagraph (i);
the Commonwealth must recover from the money so held, or must realise the investments so held and recover from the proceeds of the realisation, an amount not exceeding the amount referred to in paragraph (a) and the recovery of that amount is, to the extent of the amount, a discharge of the liability of the debtor to the Commonwealth and of the Commonwealth to the debtor.