24 Pa. Stat. § 6-679
Each resident or inhabitant, over eighteen years of age, in every school district of the second, third, and fourth class, which shall levy such tax, shall annually pay, for the use of the school district in which he or she is a resident or inhabitant, a per capita tax of not less than one dollar nor more than five dollars, as may be assessed by the local school district. The tax collector shall not proceed against a spouse or his employer until he has pursued remedies against the delinquent taxpayer and the taxpayer's employer under this section.
Each school district may exempt any person whose total income from all sources is less than ten thousand dollars per annum from its per capita tax or any portion thereof. The school district may adopt and employ regulations for the processing of claims for the exemption.
24 P.S. § 6-679