(1) If a parent who made an election under section 146G relating to a child revokes the election and substitutes a new election before the provisional notional assessment becomes a notional assessment under section 146E, then, for the purposes of making the provisional notional assessment, the parent's adjusted taxable income is the amount the parent elected in the new election.
(2) Subsection (1) has effect subject to any order or determination referred to in paragraph (a) of the definition of income amount order that is made after the making of the election that applies in relation to the parent and the particular day in the child support period in respect of which the provisional notional assessment is made.
(3) The Registrar must take such action as is necessary to give effect to subsection (1) in relation to the provisional notional assessment that has been made in relation to the parent and the child (whether by varying the provisional notional assessment or otherwise).
(4) This section does not prevent:
(a) the Registrar making a determination under Part 6A; or
(b) a court making any order under Division 4 of Part 7; or
(c) the making, and acceptance by the Registrar, of a child support agreement that includes provisions that have effect, for the purposes of Part 5, as if they were such an order made by consent.