Cal. INS § 11592

Notwithstanding the provisions of subdivision (f) of Section 1851, the rates, classifications, and rating systems for the workers’ compensation insurance covering those persons defined as employees by subdivision (d) of Section 3351 of the Labor Code, and the insurers issuing such insurance coverage, shall be subject to the provisions of Chapter 9 (commencing with Section 1850) of Part 2 of Division 1.