Cal. Bus. & Prof. Code § 13446

The department may establish interim specifications for alternative fuel for use in motor vehicles until a standards development organization accredited by the American National Standards Institute (ANSI) formally adopts a standard for the fuel for use in motor vehicles. The department shall then adopt, by reference, the latest standard established by the ANSI-accredited standards development organization for alternative fuel, except that no specification shall be less stringent than required by any California state law.