N.D. Cent. Code § 20.1-13-20: Personal flotation devices

It is unlawful for any person to operate or to be a passenger on any vessel less than twenty-seven feet [8.2296 meters] in length unless all persons, ten years of age or younger present on the vessel, wear an appropriately sized and properly fastened coast guard-approved type I, II, or III wearable personal flotation device while the vessel is in operation. A personal flotation device is appropriately sized if it is designed to be worn by a person of similar age, size, or weight as the wearer.