Upon demand of either party thereto or any person affected thereby all arrangements and agreements whatever between two or more telephone companies doing business in this Commonwealth, affecting or regulating the division of charges, earnings, or the manner of transmission of messages over their respective lines, or the physical connection between the lines of such companies, shall be submitted to the Commission for inspection insofar as they may affect the efficiency of the public service and the ability of the respective companies to best serve the public and be subject to its approval.
Code 1919, § 4053.