(a) In this section:
(1) "Energy source" means any fuel or power source used to power an engine.
(2) "Engine" means a machine for converting an energy source into mechanical force and motion, including an internal combustion engine or a generator.
(b) A state agency shall not:
(1) prohibit or otherwise restrict the sale or use of a motor vehicle based on the vehicle's energy source; or
(2) prohibit a person from owning a motor vehicle that is powered by an engine.
(c) The state's air quality state implementation plan shall not include a provision that restricts the ability of a person to purchase any motor vehicle, including a motor vehicle powered by an engine.