No more than 12 children unrelated to the operator may simultaneously receive care except in a facility serving older school-age children. In a facility serving only older school-age children, a certificate of compliance may be issued for up to 15 children unrelated to the operator.
55 Pa. Code § 3280.51
This section cited in 55 Pa. Code § 3280.113 (relating to supervision of children); 55 Pa. Code § 3280.221 (relating to requirements specific to school-age programs); and 55 Pa. Code §3300.51 (relating to similar developmental level).