24 Pa. Stat. § 15-1546
The superintendent of the school district shall, upon the written request of a parent or other person in loco parentis, excuse any student who is the child of that parent or person in loco parentis from school attendance for a total of not more than thirty-six (36) hours per school year in order to attend classes for religious instruction: Provided, however, That the request shall identify and describe the instruction, and the dates and hours for which the absence is requested and that the parent or person in loco parentis shall, following each such absence, furnish in writing to the superintendent of the school district a statement attesting that the child did in fact attend the instruction and the dates and hours upon which such attendance took place.
24 P.S. § 15-1546