If:
(a) a registered maintenance liability of a kind mentioned in section 18A of the Registration and Collection Act relates to a particular child, a liable parent and a carer entitled to child support; and
(b) after the registration of the liability, an application is made for an administrative assessment of child support in relation to the child, the liable parent and the carer entitled to child support; and
(c) either the liable parent or the carer entitled to child support is a resident of a reciprocating jurisdiction;
then the Registrar may determine that the application is taken not to have been properly made.