Section 39-21-45.1 - Modification of motor vehicle1. An individual who operates a registered motor vehicle on a highway may not modify that vehicle unless the modification meets the following requirements: a. Any modifying equipment must meet any other requirement applicable to a vehicle under chapter 39-21.b. If tires placed on a motor vehicle have a diameter greater than that of the tires on the motor vehicle as manufactured, those tires must be branded with a United States department of transportation tire identification number.c. The maximum body height permitted for a motor vehicle is forty-two inches [106.68 centimeters]. Measurement of body height is made from a level ground surface to the floor of the cargo area.2. An individual may not operate a registered motor vehicle on a highway unless the motor vehicle is equipped with front and rear bumpers. The height of the bumper must not exceed twenty-seven inches [68.58 centimeters] and this measurement is made from a level ground surface to the highest point on the bottom of the bumper. A horizontal drop bumper may be used to comply with this subsection and must be at least three inches [7.62 centimeters] in vertical width; extend the entire horizontal body width; and be horizontal, load bearing, and attached to the vehicle frame to effectively transfer impact when engaged.3. Vehicles owned by law enforcement agencies, the military, firefighting agencies, and ambulances may be modified without regard to this section.4. The director may adopt rules to implement this section.Amended by S.L. 2015 , ch. 264( SB 2166 ), § 6, eff. 8/1/2015.