Hawaii Revised Statutes Division 1. Government § 54-51

There shall be a board of water supply of the county of Hawaii, to consist of nine members, of whom eight shall be appointive members and be appointed as hereinafter provided, and of whom the ninth member shall always be the person who for the time being shall be the legal incumbent of the office of the chief engineer of the department of public works of the county. The board shall manage, control, and operate the water systems and properties of the county, for the supplying of water to the public within the several districts of the county, and collect, receive, expend, and account for all sums of money derived from the operation thereof, and all other moneys provided for the use or benefit of each or all of the water systems as in this part provided.