Cal. Bus. & Prof. Code § 6202

The provisions of Article 3 (commencing with Section 950) of Chapter 4 of Division 8 of the Evidence Code shall not prohibit the disclosure of any relevant communication, nor shall the provisions of Chapter 4 (commencing with Section 2018.010) of Title 4 of Part 4 of the Code of Civil Procedure be construed to prohibit the disclosure of any relevant work product of the attorney in connection with: (a) an arbitration hearing or mediation pursuant to this article; (b) a trial after arbitration; or (c) judicial confirmation, correction, or vacation of an arbitration award. In no event shall such disclosure be deemed a waiver of the confidential character of such matters for any other purpose.