49 C.F.R. § 570.51 Scope.
Title 49 - Transportation
This part specifies standards and procedures for the inspection of brake, steering and suspension systems, and tire and wheel assemblies, of motor vehicles in use with a gross vehicle weight rating of more than 10,000 pounds.
Title 49: Transportation
PART 570—VEHICLE IN USE INSPECTION STANDARDS
Subpart B—Vehicles With GVWR of More Than 10,000 Pounds
§ 570.51 Scope.