Cal. Bus. & Prof. Code § 7470.19

Any meeting of a mediator or arbitrator with any party or group or both parties or groups to the negotiations process and the mediation and arbitration processes set forth in Section 7470.14 is exempt from the Bagley-Keene Open Meeting Act (Article 9 (commencing with Section 11120) of Chapter 1 of Part 1 of Division 3 of Title 2 of the Government Code).