Upon petition signed by one or more claimants to water of any stream system, requesting the determination of the rights of the various claimants to the water of that stream system, the board shall, if, upon investigation, it finds the facts and conditions are such that the public interest and necessity will be served by a determination of the water rights involved, enter an order granting the petition and make proper arrangements to proceed with the determination.
(Amended by Stats. 1957, Ch. 1932.)