Cal. Lab. Code § 148.7

The appeals board, acting as a whole, may adopt, amend, or repeal rules of practice and procedure pertaining to hearing appeals and other matters falling within its jurisdiction. All such rules, amendments thereto, or repeals thereof shall be made in accordance with the provisions of Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code.