66 Pa.C.S. § 1101

Upon the application of any proposed public utility and the approval of such application by the commission evidenced by its certificate of public convenience first had and obtained, it shall be lawful for any such proposed public utility to begin to offer, render, furnish, or supply service within this Commonwealth. The commission's certificate of public convenience granted under the authority of this section shall include a description of the nature of the service and of the territory in which it may be offered, rendered, furnished or supplied.