Cal. Bus. & Prof. Code § 4618

The Legislature finds and declares that due to important health, safety, and welfare concerns that affect the entire state, establishing a uniform standard of certification for massage practitioners and massage therapists upon which consumers may rely to identify individuals who have achieved specified levels of education, training, and skill is a matter of statewide concern and not a municipal affair, as that term is used in Section 5 of Article XI of the California Constitution. Therefore, this chapter shall apply to all cities, counties, and cities and counties, including charter cities and charter counties.