19 C.F.R. § 115.68 Termination of approval.
Title 19 - Customs Duties
Any road vehicle whose essential features are changed shall no longer be covered by the design type approval. Such a road vehicle may be made available to a Certifying Authority for inspection and individual approval in accordance with subpart E of this part. However, repairs in kind do not constitute a change of the essential features.
Title 19: Customs Duties
PART 115—CARGO CONTAINER AND ROAD VEHICLE CERTIFICATION PURSUANT TO INTERNATIONAL CUSTOMS CONVENTIONS
Subpart F—Procedures for Approval of Road Vehicles by Design Type
§ 115.68 Termination of approval.