Property tax rates in 2013–2014 were set by the Armstrong School Board at: Armstrong County residents – 56.6448 mills and the residents in Indiana County was 160.8425 mills. School districts located in more than one county are required to apportion the tax levy based on the market value in each county as determined by the State Tax Equalization Board pursuant to section 672.1 of the School Code. As a result, the tax rate increases are not the same for each county in a multi-county school district. A mill is $1 of tax for every $1,000 of a property's assessed value. Irregular property reassessments have become a serious issue in the commonwealth as it creates a significant disparity in taxation within a community and across a region. Property taxes, in the Commonwealth of Pennsylvania, apply only to real estate – land and buildings. The property tax is not levied on cars, business inventory, or other personal property. Certain types of property are exempt from property taxes, including: places of worship, places of burial, private social clubs, charitable and educational institutions and government property. Additionally, service related, disabled US military veterans may seek an exemption from paying property taxes. Pennsylvania school district revenues are dominated by two main sources: 1) Property tax collections, which account for the vast majority (between 75–85%) of local revenues; and 2) Act 511 tax collections, which are around 15% of revenues for school districts.