The Act 1 of 2006 Index regulates the rates at which each school district can raise property taxes in Pennsylvania. Districts are not allowed to raise taxes above that index unless they allow voters to vote by referendum, or they seek an exception from the state Department of Education. The base index for the 2011–2012 school year is 1.4 percent, but it can be adjusted higher, depending on a number of factors, such as property values and the personal income of district residents. Act 1 included 10 exceptions: increasing pension costs, increases in special education costs, a catastrophe like a fire or flood, increasing rising health care costs for contracts in effect in 2006 or declining local tax bases. The base index is the average of the percentage increase in the statewide average weekly wage, as determined by the Pennsylvania Department of Labor and Industry, for the preceding calendar year and the percentage increase in the Employment Cost Index for Elementary and Secondary Schools, as determined by the Bureau of Labor Statistics in the U.S. Department of Labor, for the previous 12-month period ending June 30. For a school district with a market value/personal income aid ratio (MV/PI AR) greater than 0.4000, its index equals the base index multiplied by the sum of .75 and its MV/PI AR for the current year. With the 2011 state education budget, the General Assembly voted to end most of the Act 1 exceptions leaving only special education costs and pension costs. The cost of construction projects will go to the voters for approval via ballot referendum.