(1) If:
(a) child support is payable for a child; and
(b) the Registrar is notified of, or otherwise becomes aware of:
(i) the happening of a child support terminating event in relation to the child, a liable parent, or a carer entitled to child support, or all 3; or
(ii) the happening of an event or change of circumstances that affects the annual rate at which the child support is payable under this Act;
the Registrar must immediately take such action as is necessary to take account of the happening of the event or change of circumstances (whether by amending any administrative assessment or otherwise).
(2) Nothing in subsection (1) is to be taken to prevent the Registrar from taking such action as the Registrar considers appropriate to take account of the likely happening of an event or change of circumstances of which the Registrar is notified or otherwise becomes aware (whether by amending any administrative assessment or otherwise).