California Business and Professions Code > Bus. & Prof. Code §11280. Regulation of Time-Share Plans and Exchange Programs within Exclusive Power of the State
(a) Except as specifically provided in this section, the regulation of time-share plans and exchange programs is an exclusive power and function of the state. A unit of local government may not regulate time-share plans or exchange programs.
(b) Notwithstanding subdivision (a), no provision of this chapter invalidates or modifies any provision of any zoning, subdivision, or building code or other real estate use law, ordinance, or regulation.