Section 4
SEC. 4. (a) This franchise shall not take effect nor shall any powers thereunder be exercised by the grantee until the Secretary of Public Works and Communications shall have allotted to the grantee the frequencies and wave lengths to be used thereunder and determined the stations to and from which each frequencies and wave lengths may be used, and issued to the grantee a license for such use, unless the grantee shall use existing channels, circuits and/or stations of communication duly licensed by the Philippine Government. (b) The Secretary of Public Works and Communications on reasonable notice to the grantee, may at any time change or cancel, or modify, in whole or in part, any or all the allotments of frequencies and wave lengths to be used. He may take such action (1) whenever in his judgment such frequencies and wave lengths have been used, or there is danger that they will be used by the grantee to impair electrical communication, or stifle competition, or to obtain a monopoly in electrical communication, or to secure unreasonable rates for such communication, or otherwise to violate the laws or public policy of the Philippine Republic; (2) whenever in his judgment the public interests of the Philippines require that such frequencies or wave lengths should be used for purposes other than those of the grantee, either by the Government of the Philippines or by other individuals corporations licensed by it; and (3) whenever in his Judgment for any reason the public interests of the Philippines so require. (c) The Secretary of Public Works and Communications is authorized to appoint, employ or make use of such boards, commissions, or agents as in his discretion he may select, to investigate and determine the facts upon which he may act as aforesaid, and such boards, commissions and agents shall have the right by the compulsory process of subpoena, to summon witnesses, administer oaths and take evidence.