Section 3
SEC. 3. (a) This temporary permit shall not take effect nor shall any powers thereunder be exercised by the grantee until the Secretary of Public Works and Communications shall have alloted to the grantee the frequencies and wave lengths to be used thereunder and determined the stations to and from which each such frequency and wave length may be used, and issued to the grantee a license for such use. (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 of the allotments of frequencies or 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 Republic of the Philippines; (2) whenever in his judgment the public interests of the Philippines require that such frequencies or wave lengths should be used for other purposes than those of the grantee, either by the Government of the Philippines or by other individuals or corporations licensed by it; (3) whenever in his judgment for any reason the public interests of the Philippines so require. (c) The Secretary of Public Works and Communications s 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 may act as aforesaid, and such boards, commissions or gents shall have the right by compulsory process of subpoena, to summon witnesses, administer oaths, and take evidence.