(1) If:
(a) at any time an amount of child support for a child becomes payable by a liable parent to another person under an administrative assessment; and
(b) immediately before that time, a court order or a court registered maintenance agreement, a financial agreement (within the meaning of the Family Law Act 1975 ) or a Part VIIIAB financial agreement (within the meaning of that Act), had effect under which child support or maintenance for the child was payable by the liable parent to the other person; and
(c) the court order, maintenance agreement, financial agreement or Part VIIIAB financial agreement did not give rise to an overseas maintenance liability;
the court order, maintenance agreement, financial agreement or Part VIIIAB financial agreement ceases, at that time, to have effect.
(2) If:
(a) at any time, an amount of child support for a child becomes payable by a liable parent to another person under an administrative assessment; and
(b) at that time, the liable parent and the other person are both residents of Australia; and
(c) immediately before that time, an overseas maintenance liability had effect under which maintenance for the child was payable by the liable parent to the other person;
the overseas maintenance liability ceases, at that time, to have effect.