California Code, Water Code - WAT § 41027

(a) The board shall hold a public hearing to receive any testimony regarding the preliminary election roll.  The hearing may be continued from time to time.  Following the hearing and deliberations, the board shall make any changes to the preliminary election roll and shall adopt the election roll.

(b) If the preliminary election roll was prepared pursuant to paragraph (1) of subdivision (b) of Section 41026, the adopted election roll shall be deemed the final election roll.

(c) If the preliminary election roll was prepared pursuant to paragraph (2) of subdivision (b) of Section 41026, the secretary shall send the adopted election roll to the board of supervisors of the principal county.  Upon receiving the adopted election roll, the board of supervisors of the principal county shall set the date, time, and place for a public hearing to receive any testimony regarding the adopted election roll.  The board of supervisors shall publish a notice of its public hearing pursuant to Section 39057.  At the hearing, the board of supervisors shall receive any testimony regarding the adopted election roll.  The hearing may be continued from time to time.  Following the hearing and deliberations, the board of supervisors shall either approve or disapprove the adopted election roll.  If the board of supervisors approves the adopted election roll, it shall send the final election roll to the board.  If the board of supervisors disapproves the adopted election roll, the board of supervisors shall notify the board of its disapproval and may recommend changes to the adopted election roll for the board to consider.  The district shall compensate the principal county for any costs incurred by the board of supervisors pursuant to this chapter.

(d) The secretary shall certify and file the final election roll not later than the date of the first publication of the notice provided pursuant to Section 41308.