Cal. Health and Safety Code § 19955.5

All passenger vehicle service stations, shopping centers, offices of physicians and surgeons, and office buildings constructed in this state with private funds shall adhere to the provisions of Chapter 7 (commencing with Section 4450) of Division 5 of Title 1 of the Government Code. As used in this section, “office building” means a structure wherein commercial activity or service is performed or a profession is practiced, or wherein any combination thereof is performed or practiced in all or the majority of the building or structure. When sanitary facilities are made available for the public, clients, or employees in these stations, centers, or buildings, they shall be made available for persons with disabilities. Any new requirements imposed by the amendments to this section by Chapter 931 of the Statutes of 1973 shall only apply to those stations, centers, or office buildings constructed on or after September 30, 1973. Any other new requirements imposed by amendments to this section by Chapter 995 of the Statutes of 1974 shall only apply to those offices or office buildings constructed on or after January 1, 1975.