Section 13
SEC. 13. Except as otherwise provided herein, the Commission shall have general supervision and regulation of, jurisdiction and control over, all public services, and also over their property, property rights, equipment, facilities; and franchises so far as may be necessary for the purpose of carrying out the provisions of this Act, and in the exercise of its authority it shall have the necessary powers and aid of the public force: Provided, however, That the Commission shall have no control or jurisdiction over ice plants, cold storage plants, or any public services operated by the Government of the United States in the Philippines exclusively for Its own use and not to serve private persons for pay or compensation, nor over municipal warehouses nor animal-drawn vehicles: Provided, further. That the Commission shall not exercise any control or supervision over air craft in the Philippines, except with regard to the fixing of maximum passenger and freight rates, nor over the Manila Railroad Company until the same shall be controlled by the Government of the Philippines, nor over radio companies or concerns except as regards the fixing of rates: Provided, further, That the control and jurisdiction of the Commission over ships shall be limited to the fixing of freight and passenger rates.