California Code, Labor Code - LAB § 516

(a) Except as provided in Section 512, the Industrial Welfare Commission may adopt or amend working condition orders with respect to break periods, meal periods, and days of rest for any workers in California consistent with the health and welfare of those workers.

(b) Notwithstanding subdivision (a), or any other law, including Section 512, the health care employee meal period waiver provisions in Section 11(D) of Industrial Welfare Commission Wage Orders 4 and 5 were valid and enforceable on and after October 1, 2000, and continue to be valid and enforceable. This subdivision is declarative of, and clarifies, existing law.