Executive Order 2011-04 requires that the Arizona Department of Administration (ADOA) develop population projections for a minimum of 25 years for the State, its counties, its incorporated jurisdictions and the unincorporated balance of each county. It also authorizes councils of governments (COGs) to prepare subregional projections using the county population as a control total. In preparing these projections, MAG is required to follow standards established by ADOA. Subregional projections are used by MAG as input into the MAG transportation models to predict automobile traffic; by MAG as input into the MAG air quality models to predict emissions and concentrations; by local governments to evaluate infrastructure improvements; for gauging regional development and land use plans; by local governments to prepare general plans; by developers to identify sites for residential and commercial development; by human services providers for planning; and by school districts for planning infrastructure.