California Code, Water Code - WAT § 2763.5

(a) No exception to the order of determination shall be considered, except in the court's discretion for good cause shown, unless the matter of the exception was presented to the board in the form of an objection. Good cause includes, but is not limited to, the existence of newly discovered relevant evidence which, in the exercise of reasonable diligence, could not have been presented to the board during the board's proceedings.

(b) This section does not apply to persons to whom the board did not mail either (1) written notice of the board meeting at which the petition pursuant to Section 2525 is to be considered as an item of business, or (2) written notice of the pendency of the proceedings pursuant to Section 2526.