(1) If:
(a) an administrative assessment of child support is in force in relation to a parent; and
(b) the Registrar is later notified, or otherwise becomes aware, of the fact that the parent has a relevant dependent child who was not taken into account for the purposes of making the assessment;
then, for the purposes of working out the parent's relevant dependent child amount under section 46, the parent is taken to have the relevant dependent child:
(c) if the Registrar was notified, or otherwise became aware, of the fact that the child is a relevant dependent child of the parent within 28 days after the day on which the child became such a child--on and from the day the child became such a child; or
(d) if paragraph (c) does not apply and the Registrar was notified, or otherwise became aware, of the fact within 28 days after giving a notice under section 34 (giving notice of successful application)--on and from the day on which the application was made; or
(e) if neither paragraph (c) nor (d) applies--on and from the day the Registrar was notified, or otherwise became aware, of the fact that the child is a relevant dependent child of the parent.
(2) If the parent is a resident of a reciprocating jurisdiction, subsection (1) has effect as if the references in paragraphs (1)(c) and (d) to 28 days were references to 90 days.