Cal. Health & Safety Code § 4716

At the election only voters registered in the proposed district may vote. Election precincts shall be established by the board of supervisors, and precinct boards, composed of one inspector, one judge, and one clerk, shall be appointed. At least one week prior to the election, notice of the election shall be given by publication in a newspaper of general circulation in the proposed district. In other particulars the election shall be conducted in the manner ordered by the board of supervisors.