(2) The Minister may, in writing, before the day on which the amount is first indexed, determine that a higher amount is to be substituted for that amount. The determination has effect accordingly.
(3) A determination under subsection (2) is a disallowable instrument for the purposes of section 46A of the Acts Interpretation Act 1901 .
(4) The regulations may prescribe:
(b) the way in which the amount is to be indexed.
(6) If an amount (the indexable amount ) is indexed in accordance with the regulations, subsection 27(1) has effect as if the new amount (as indexed) were substituted for the indexable amount on the day when the indexation takes effect.