Ariz. Rev. Stat. § 15-901.01
If approved by the qualified electors voting at a statewide general election, for fiscal years 2001-2002 through 2005-2006, the legislature shall increase the base level or other components of the revenue control limit by two per cent. For fiscal year 2006-2007 and each fiscal year thereafter, the legislature shall increase the base level or other components of the revenue control limit by a minimum growth rate of either two per cent or the change in the GDP price deflator, as defined in section 41-563, from the second preceding calendar year to the calendar year immediately preceding the budget year, whichever is less, except that the base level shall never be reduced below the base level established for fiscal year 2001-2002.
A.R.S. § 15-901.01
Caution: 1998 Prop. 105 may apply