Cal. Health and Safety Code § 118505

(a) Publicly and privately owned facilities where the public congregates shall be equipped with sufficient temporary or permanent restrooms to meet the needs of the public at peak hours. (b) In conformity with the State Plumbing Code, and except as otherwise provided in this section, standards shall be adopted in order to enforce this section, as follows: (1) The State Building Standards Commission shall adopt standards with respect to all state-owned or state-occupied facilities where the public congregates and over which it has jurisdiction pursuant to Section 18934.5. (2) The Office of the State Architect shall adopt standards with respect to all facilities where the public congregates and that are not covered by paragraph (1), unless exempt from coverage pursuant to this section. (c) The standards adopted pursuant to subdivision (b) shall be published in the State Building Standards Code contained in Title 24 of the California Code of Regulations. (d) This section shall apply to facilities where the public congregates that commence construction, or that undertake structural alterations, repairs, or improvements exceeding 50 percent of the entire facility, on or after January 1, 1989. (e) For the purposes of this section, “facilities where the public congregates” means sports and entertainment arenas, stadiums, community and convention halls, specialty event centers, amusement facilities, and ski resorts. For purposes of this section, “facilities where the public congregates” also means specialty event centers in public parks. (f) This section shall not apply to the following: (1) Any hotel. For purposes of this section, “hotel” means an establishment in which there exists the relationship of guests and innkeeper between the occupants and the owner or operator of the establishment. The existence of some other legal relationship between the occupants and owner or operator shall be immaterial. (2) Any restaurant or food facility, as defined in Section 113785. (3) Any public or private elementary or secondary school facility. (4) Any qualified historic building, defined as qualifying under provisions in the State Historical Building Code contained in Part 8 (commencing with Section 8-100) of Title 24 of the California Code of Regulations. (g) It is the intent of the Legislature that, in order to ensure that standards are both viable and efficacious, the Office of the State Architect and the State Building Standards Commission hold a series of public meetings with representatives of affected industries and state and local agencies prior to adopting standards under this section.