California Code, Water Code - WAT § 74466

(a) The board of supervisors shall hear all interested persons and may adjourn the hearing from time to time. Following the hearing, the board of supervisors may further change the proposed division boundaries provided thatthe change is in accordance with this chapter and the resolution and petition. The board of supervisors shall make an order describing the proposed divisions of the district, numbering such divisions consecutively, and directing that such proposed redivision be submitted to the electors of the district at a special election to be consolidated with the next district general election to be held not earlier than 120 days thereafter.

(b) Notwithstanding subdivision (a), a redivision involving only changes to the boundaries of the divisions of a district based upon population, independent of a change in the basis of dividing the district into divisions, shall not be submitted to the electors of the district.