51 Pa.C.S. § 506: Organization of Pennsylvania Guard for emergency.

Whenever the Pennsylvania National Guard, or any part thereof, shall be called or ordered into the service of the United States, the Governor may organize units of the Pennsylvania Guard for the internal security of this Commonwealth. The Governor shall comply with the laws of the United States for the organization, maintenance and functioning of this force. The Governor is further empowered to organize at any time a nucleus of Pennsylvania Guard personnel for the purpose of planning.