Section 90
SEC. 90. Bona fide holders of a mining claim or group of contiguous claims under this Act shall also be allowed a gratuitous water right or rights for the development and operation of such claim or claims upon filing an application therefor with the Director of the Bureau of Public Works in accordance with the existing law of waters and the rules and regulations promulgated thereunder: Provided, That water rights already granted or vested through long use, recognized and acknowledged by the local customs, laws and decisions of courts, shall not thereby be impaired: Provided, further, That the Government reserves the right to regulate water rights and the reasonable and equitable distribution of water supply so as to prevent the monopoly of the use thereof.