Cal. Bus. & Prof. Code § 13446

On or before January 1, 2008, the department, with the concurrence of the State Air Resources Board, shall establish specifications for hydrogen fuels for use in internal combustion engines and fuel cells in motor vehicles until a standards development organization accredited by the American National Standards Institute (ANSI) formally adopts standards for hydrogen fuels for use in internal combustion engines and fuel cells in motor vehicles. The department shall then adopt by reference the latest standards established by the ANSI-accredited standards development organization for hydrogen fuel for use in internal combustion engines and fuel cells in motor vehicles, except that no specification or standard shall be less stringent than is required by state law.