California Code, Government Code - GOV § 11017

Notwithstanding any other provision of law, each state agency in performing its duties shall comply with all local air pollution control rules, regulations, and ordinances which are more stringent than any applicable state air pollution control statute, rule, or regulation.

In any area where neither any local air pollution control rules, regulations, or ordinances nor any state air pollution control statute, or rule or regulation adopted by the State Air Resources Board pursuant to Section 41503 or 41504 of the Health and Safety Code, applies, the State Air Resources Board may adopt, after a public hearing, air pollution control rules and regulations for state agencies performing their duties in such areas, and each state agency in performing its duties in such area shall comply with such air pollution control rules and regulations.