school districts; aggregate expenditure limitation

This bill updates Arizona's formula for calculating annual spending limits for school districts and other local governments subject to constitutional expenditure restrictions. It requires the state commission to determine each district's limit based on 1979-1980 spending levels, adjusted for population changes (including annexed areas) and inflation using GDP price deflators. The key mechanism calculates a new limit each year by comparing current population to 1978 population and applying inflation adjustments to the baseline spending. This directly affects all Arizona school districts and municipalities operating under the state's expenditure limitation rules.