California Code, Code of Civil Procedure - CCP § 1258.230

(a) Not later than the date of exchange:

(b) The clerk of the court shall make an entry in the register of actions for each list of expert witnesses and statement of valuation data deposited with him pursuant to this article. The lists and statements shall not be filed in the proceeding, but the clerk shall make them available to the court at the commencement of the trial for the limited purpose of enabling the court to apply the provisions of this article. Unless the court otherwise orders, the clerk shall, at the conclusion of the trial, return all lists and statements to the attorneys for the parties who deposited them. Lists or statements ordered by the court to be retained may thereafter be destroyed or otherwise disposed of in accordance with the provisions of law governing the destruction or disposition of exhibits introduced in the trial.