(1)

If the all groups consumer price index number for the weighted average of the 8 capital cities published by the Statistician in respect of the first quarter of the half-year before the date of the indexation (factor A ) exceeds the highest all groups consumer price index number for the weighted average of the 8 capital cities published by the Statistician in respect of any earlier half-year, not being a half-year earlier than the half-year that commenced on 1 January 2004, (factor B ) the amount is increased at the rate worked out in accordance with subsection (2).

(2) The rate is A - B expressed as a percentage of B.