N.D. Cent. Code § 39-21-44.2: Drawbar or connection between vehicles - Precautions required

The drawbar or other coupling device between vehicles, one of which is towing or drawing the other on a highway, must include safety chains connecting the vehicles. The drawbar or other coupling device, and the safety chains, must be of a design, strength, and construction so as to prevent the unintentional uncoupling of the vehicles. The safety chain requirement of this section does not apply to:

1.A fifth-wheel coupling device; or

2.A vehicle towing an implement of husbandry or an implement of husbandry towing a vehicle, when operated at a speed not exceeding twenty-five miles [40.23 kilometers] per hour.