40 Pa. Stat. § 539
Any officer or officers of the Commonwealth of Pennsylvania or its departments, boards, commissions and agencies, or of any political subdivision thereof, whose duty it is or may be to make payments or disbursements in the form of salaries, wages or other compensation to any elected or appointed officer or employe, shall, upon receipt of written authorization from any such officer or employe so to do, withhold from the salary, wages or other compensation to be paid any such officer or employe, any premium or other charge due from such officer or employe for group insurance covering life, health, hospitalization, medical, osteopathic, or dental service, or accident insurance, pursuant to any contract with any insurance company, or nonprofit hospitalization corporation, or nonprofit medical, osteopathic or dental service corporation authorized to transact business with the Commonwealth.
40 P.S. § 539