A bill to exempt natural gas vehicles from certain maximum fuel economy increase standards, and for other purposes.

Exempts natural gas automobiles from the maximum fuel economy increase standards for dual fueled automobiles for model years 1993-2019.

Revises the definition of a "dedicated automobile" (i.e., an automobile that operates only on alternative fuel) to prohibit the inclusion of a reserve gasoline tank for incidental or emergency use in the event of alternative fuel depletion from detracting from the dedicated nature of such an automobile.