Cal. Health & Safety Code § 110111

All nonprescription drug regulations and any amendments to those regulations adopted pursuant to the federal act, that are in effect on January 1, 2000, or that are adopted on or after that date, shall be the nonprescription drug regulations of the state. The department may adopt any nonprescription drug regulation it deems necessary for the administration and enforcement of this part, provided that the regulation is not different from, or in addition to, any requirement for nonprescription drugs pursuant to Section 751 (21 U.S.C. Sec. 379r) of the federal act.