Cal. Water Code - WAT § 22700. Section 22700.No contest of any thing or matter herein provided shall be made other than in the time and manner herein specified.
Cal. Water Code - WAT § 22701. Section 22701.In any such action all findings of fact or conclusions of a board or board of supervisors upon all matters shall be conclusive unless the action was instituted within six months after the finding or conclusion was made.