Amend CSHB 1006, in Section 26.046, Tax Code, as added by the Carter Casteel amendment to the bill, by striking Subsection (d) of that added section, and substituting the following: (d) The effective tax rate and the rollback tax rate for a taxing unit calculated under any other provision of this chapter are increased by the rate that, if applied to current total value, would impose an amount of taxes equal to the amount the taxing unit is required to spend to comply with or implement an unfunded state mandate in the budget year for which the taxes will be imposed. If the taxing unit is a county or a municipality, in the formula for calculating the rollback tax rate under any other provision of this chapter, the governing body of the taxing unit may, at its option, substitute the sum of 1 plus the consumer price index percentage change, if any, not to exceed eight percent, for 1.05. For a county or municipality that elects to make the substitution in the calculation of its rollback tax rate as authorized by this subsection, notwithstanding Section 26.07(b) (2), Tax Code, a petition authorized by Section 26.07(a) of that code is valid only if it is signed by a number of registered voters of the county or municipality equal to at least 10 percent of the number of registered voters of the taxing unit according to the most recent official list of registered voters. Not later than July 1 of each year the state auditor shall determine the consumer price index percentage change and publish that change in the Texas Register. In this subsection: (1) "consumer price index" means the consumer price index, as published by the Bureau of Labor Statistics of the United States Department of Labor, that measures the average changes in prices of goods and services purchased by urban wage earners and clerical workers' families and single workers living alone (CPI-W: Seasonally Adjusted U.S. City Average --- All Items). (2) "Consumer price index percentage change" means the percentage increase or decrease in the consumer price index for the most recent state fiscal year for which the information is available, from the consumer price index for the state fiscal year preceding that state fiscal year, as calculated by the state auditor.