51 Pa.C.S. § 2316

When the Pennsylvania National Guard, or any part thereof, is ordered or called into the service of the United States, officers, warrant officers and enlisted personnel of the Pennsylvania National Guard not accepted for Federal service because of physical defects, age or other cause may be immediately transferred to the rolls of the Pennsylvania Guard and assigned to units or organizations of the Pennsylvania Guard by the department. The officer, warrant officer and enlisted personnel so transferred may serve in the Pennsylvania Guard for the duration of the emergency plus six months unless sooner discharged under the terms of their State commission or enlistment contract.