N.D. Cent. Code § 39-10-52.2: Riding in housetrailer

No person may be on or inside a housetrailer while it is being moved upon a public highway. Such prohibition does not apply to fifth-wheel vehicles, which are defined as mobile homes, mounted on single or tandem axles, coupled by a fifth-wheel hitch to and pivoting on a mount located immediately above or in front of the rear axle of a motor vehicle other than a passenger car.