24 Pa. Stat. § 25-2543
Annually, each school district entitled to reimbursement on account of pupil transportation shall provide in a format prescribed by the Secretary of Education, data pertaining to pupil transportation for the prior and current school year. Districts will receive a payment in August equal to ten percent (10%) of the transportation subsidy paid to that school district in the prior year. An additional twenty percent (20%) payment will be provided in the month following receipt of the prior year's data. A twenty-five percent (25%) payment will be forwarded in December to all school districts that have provided current year data. A payment in March will be calculated by totaling all current year transportation payments and subtracting that total from an amount equal to eighty percent (80%) of the projected total transportation reimbursement for the current year. The final payment will occur in June and be calculated by subtracting the total of the first four payments, and any other transportation subsidy adjustments necessary, from the actual current year's total transportation reimbursement. The Department of Education may, for cause specified by it, withhold such reimbursement, in any given case, permanently, or until the school district has complied with the law or regulations of the State Board of Education.
24 P.S. § 25-2543