Commonwealth Consolidated Acts Commonwealth Consolidated Acts(1) The indexation factor is worked out using the following formula and applying subsections (2) and (3):
where:
"base December quarter" means the December quarter that has the highest index number of the December quarters before the reference December quarter (but not earlier than the December quarter 2007).
"index number" , for a quarter, means the All Groups Consumer Price Index number that is the weighted average of the 8 capital cities and is published by the Australian Statistician in relation to that quarter.
"reference December quarter" means the last December quarter before the indexation day.
(2) The indexation factor is to be worked out to 3 decimal places, but increased by 0.001 if the fourth decimal place is more than 4.
(3) If an indexation factor worked out under subsections (1) and (2) would be less than 1, that indexation factor is to be increased to 1.
Changes to CPI reference base and publication of substituted index numbers
(4) Amounts are to be worked out under this section:
(a) using only the index numbers published in terms of the most recently published reference base for the Consumer Price Index; and
(b) disregarding index numbers published in substitution for previously published index numbers (except where the substituted numbers are published to take account of changes in the reference base).