Code Civ. Proc., § 643

(a) Unless otherwise directed by the court, the referees or commissioner must report their statement of decision in writing to the court within 20 days after the hearing, if any, has been concluded and the matter has been submitted.

(b) A referee appointed pursuant to Section 638 shall report as agreed by the parties and approved by the court.

(c) A referee appointed pursuant to Section 639 shall file with the court a report that includes a recommendation on the merits of any disputed issue, a statement of the total hours spent and the total fees charged by the referee, and the referee’s recommended allocation of payment. The referee shall serve the report on all parties. Any party may file an objection to the referee’s report or recommendations within 10 days after the referee serves and files the report, or within another time as the court may direct. The objection shall be served on the referee and all other parties. Responses to the objections shall be filed with the court and served on the referee and all other parties within 10 days after the objection is served. The court shall review any objections to the report and any responses submitted to those objections and shall thereafter enter appropriate orders. Nothing in this section is intended to deprive the court of its power to change the terms of the referee’s appointment or to modify or disregard the referee’s recommendations, and this overriding power may be exercised at any time, either on the motion of any party for good cause shown or on the court’s own motion.