(1) When a decision of a court making an order under this Division becomes final, the Registrar must immediately take such action as is necessary to give effect to the decision in relation to any administrative assessment that has been made in relation to the child, the carer entitled to child support and the liable parent concerned (whether by amending the assessment or otherwise).
(2) In subsequently making an administrative assessment in relation to the child, the carer entitled to child support and the liable parent concerned while the order is in force, the Registrar must act on the basis of the provisions of this Act as modified by the order.