Section 4
SEC. 4. (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 allotted 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 otherwise to violate the laws or public policy of the Government of the Republic of the Philippines; (2) whenever in his judgment the public interests of the Philippines requires that such frequencies or wave lengths should be used for other purposes than those of the grantee, either by the Government of the Republic 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.