36 CFR § 4.22 - Unsafe operation.
(a) The elements of this section constitute offenses that are less serious than reckless driving. The offense of reckless driving is defined by State law and violations are prosecuted pursuant to the provisions of section 4.2 of this chapter.
(b) The following are prohibited:
(2) Operating a motor vehicle in a manner which unnecessarily causes its tires to squeal, skid or break free of the road surface.
(ii) On any exterior portion of the motor vehicle not designed or intended for the use of a passenger. This restriction does not apply to a person seated on the floor of a truck bed equipped with sides, unless prohibited by State law.