<P> The Energy Policy and Conservation Act ( EPCA ) , as amended by the 2007 Energy Independence and Security Act ( EISA ) , requires that the U.S. Department of Transportation ( DOT ) establish standards separately for passenger automobiles ( passenger cars ) and nonpassenger automobiles ( light trucks ) at the maximum feasible levels in each model year , and requires that DOT enforce compliance with the standards . DOT has delegated the responsibilities to the National Highway Traffic Safety Administration ( NHTSA ) . Through EPCA and EISA , U.S. law ( 49 U.S. Code § 32919 ) also preempts state or local laws : `` 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 . '' </P>
<P> The Energy Policy and Conservation Act ( EPCA ) , as amended by the 2007 Energy Independence and Security Act ( EISA ) , requires that the U.S. Department of Transportation ( DOT ) establish standards separately for passenger automobiles ( passenger cars ) and nonpassenger automobiles ( light trucks ) at the maximum feasible levels in each model year , and requires that DOT enforce compliance with the standards . DOT has delegated the responsibilities to the National Highway Traffic Safety Administration ( NHTSA ) . Through EPCA and EISA , U.S. law ( 49 U.S. Code § 32919 ) also preempts state or local laws : `` 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 . '' </P>
who sets automobile efficiency standards in the united states
who sets automobile efficiency standards in the united states
National Highway Traffic Safety Administration
National Highway Traffic Safety Administration