2024 California Rules of Court
Standard 14. Ex parte communications
(a) An arbitrator must not initiate, permit, or consider any ex parte communications or consider other communications made to the arbitrator outside the presence of all of the parties concerning a pending or impending arbitration, except as permitted by this standard, by agreement of the parties, or by applicable law.
(b) An arbitrator may communicate with a party in the absence of other parties about administrative matters, such as setting the time and place of hearings or making other arrangements for the conduct of the proceedings, as long as the arbitrator reasonably believes that the communication will not result in a procedural or tactical advantage for any party. When such a discussion occurs, the arbitrator must promptly inform the other parties of the communication and must give the other parties an opportunity to respond before making any final determination concerning the matter discussed.
(c) An arbitrator may obtain the advice of a disinterested expert on the subject matter of the arbitration if the arbitrator notifies the parties of the person consulted and the substance of the advice and affords the parties a reasonable opportunity to respond.
Comment to Standard 14
See also Code of Civil Procedure sections 1282.2(e) regarding the arbitrator's authority to hear a matter when a party fails to appear and 1282.2(g) regarding the procedures that must be followed if an arbitrator intends to base an award on information not obtained at the hearing.