In accordance with Section 619 of the Pennsylvania Municipalities Planning Code, as amended, the provisions of this chapter shall not apply to any existing or proposed building, or extension thereof, used or to be used by a public utility corporation if, upon petition of the corporation, the Pennsylvania Public Utility Commission shall, after public hearing, decide that the present or proposed situation of the building in question is reasonably necessary for the convenience or welfare of the public. It shall be the responsibility of the Pennsylvania Public Utility Commission to ensure that both the corporation and the Township have notice of the hearing and are granted an opportunity to appear, present witnesses, cross-examine witnesses presented by other parties and otherwise exercise the rights of a party to the proceedings.