Pennsylvania Statutes Title 24 P.S. Education § 12-1213. Standard limited certificates

All standard limited certificates in force in this Commonwealth at the time this section takes effect shall become permanent and no additional requirements shall be added hereafter to keep them in full force and effect or otherwise to validate such certificates provided the holders of such certificates have satisfactorily taught at least ten (10) years in the public or nonpublic schools, or both, of the Commonwealth and have earned at least ninety (90) semester credit hours of undergraduate or graduate study.