(a) General. - When an average fuel economy standard prescribed
under this chapter is in effect, a State or a political subdivision
of a State may not adopt or enforce a law or regulation related to
fuel economy standards or average fuel economy standards for
automobiles covered by an average fuel economy standard under this
(b) Requirements Must Be Identical. - When a requirement under
section 32908 of this title is in effect, a State or a political
subdivision of a State may adopt or enforce a law or regulation on
disclosure of fuel economy or fuel operating costs for an
automobile covered by section 32908 only if the law or regulation
is identical to that requirement.
(c) State and Political Subdivision Automobiles. - A State or a
political subdivision of a State may prescribe requirements for
fuel economy for automobiles obtained for its own use.