To amend section 203(a) of the Clean Air Act to permit the conversion of a motor vehicle for the use of natural gas fuel, and for other purposes.

[AI summary unavailable — showing source text] Amends the Clean Air Act to provide an exemption to the prohibition against removing or rendering inoperative any device or element of design installed on or in a motor vehicle or motor vehicle engine in compliance with such Act with respect to an action for the purpose of converting a motor vehicle to use natural gas fuel.…