California Code, Health and Safety Code - HSC § 25210

It shall be unlawful, on or after January 1, 1979, to use a nonbiodegradable toxic chemical in a chemical toilet, recreational vehicle, or waste facility of a vessel as the term vessel is defined in the Harbors and Navigation Code, and it shall be unlawful on or after January 1, 1979, to sell a nonbiodegradable toxic chemical in a container which indicates that the chemical could be used in a chemical toilet, a waste facility of a recreational vehicle, or a waste facility of a vessel as the term vessel is defined in the Harbors and Navigation Code. The department shall develop and adopt regulations to define nonbiodegradable toxic chemicals and limitations on the sale thereof by June 1, 1978.