If the Registrar is satisfied, after considering the application, that:
(a) there are no grounds for departing from the provisions of this Act relating to administrative assessment of child support in relation to the child concerned; or
(b) that it would not be:
(i) just or equitable as regards the child or either party to the application; or
(ii) otherwise proper;
to make the determination;
the Registrar may refuse to make the determination without taking any further action under this Part.