Section 13
SEC. 13. The Commission shall have general supervision and regulation of, jurisdiction and control over, all public utilities, and also over their property, property rights, equipment, facilities and franchises so far as may be necessary for the purposes of carrying out the provisions of this Act. The term "public utility" is hereby denned to include every individual, copartnership, association, corporation, or joint-stock company, whether domestic or foreign, their lessees, trustees, or receivers appointed by any court whatsoever, or any municipality, province, or other department of the Government of the Philippine Islands, that now or hereafter may own, operate, manage, or control within the Philippine Islands any common carrier, railroad, street railway, traction railway, steamboat or steamship line, small water craft, such as bancas, virays, lorchas, and others, engaged in the transportation of passengers or cargo, freight and or passenger motor vehicles, with or without fixed route shipyard, marine railway, marine repair shop, ferry, freight or any other car service, public warehouse, public wharf or dock not under the jurisdiction of the Insular Collector of Customs, ice, refrigeration, cold storage, canal, irrigation, express, subway, pipe line, gas, electric light, heat, power, water, oil, sewer, telephone, wire or wireless telegraph system, plant or equipment, for public use: Provided, That as regards such common carriers, by land or by water, whose equipment is used principally or secondarily in furtherance of their private business, the net earnings of the latter business shall be considered in connection with their common carrier business for the purposes of rate fixing: Provided, further, That the Commission shall have no jurisdiction over ice plants, cold storage plants, or any other kind of public utilities operated by the Federal in Government exclusively for its own and not for public use: And provided, lastly, That the Public Utility Commission shall not exercise any control or supervision over the Manila Railroad Company so long as the same shall be controlled by the Government of the Philippine Islands, except with regard to its rates.