(1) Subject to this Part, the Registrar may make the determination if:
(a) the Registrar is satisfied that, in the special circumstances of the case, application in relation to a child of the provisions of this Act relating to administrative assessment of child support would result in an unjust and inequitable determination of the level of financial support to be provided by the liable parent for the child because of the income, earning capacity, property and financial resources of either parent; and
(b) that it would be:
(i) just and equitable as regards the child, the liable parent, and the carer entitled to child support; and
(ii) otherwise proper;
to make a particular determination under this Part.
(2) Subsections 117(4) to (9) (inclusive) apply to the Registrar in the exercise of his or her powers under this section as if:
(a) any reference in those subsections to the court were a reference to the Registrar; and
(b) any reference to an order were a reference to a determination.