California Code, Labor Code - LAB § 6603

(a) The rules of practice and procedure adopted by the appeals board shall be consistent with Article 8 (commencing with Section 11435.05) of Chapter 4.5 of Part 1 of Division 3 of Title 2 of, and Sections 11507, 11507.6, 11507.7, 11513, 11514, 11515, and 11516 of, the Government Code, and shall provide affected employees or representatives of affected employees an opportunity to participate as parties to a hearing under Section 6602.

(b) The superior courts shall have jurisdiction over contempt proceedings, as provided in Article 12 (commencing with Section 11455.10) of Chapter 4.5 of Part 1 of Division 3 of Title 2 of the Government Code.