A trailer, a semitrailer or a semitrailer converted to a trailer by the use of a converter gear dolly must not have a body for cargo which is more than 48 feet long if it is operated in a combination of vehicles consisting of more than one unit for cargo. A trailer or semitrailer which is 48 feet in length may not be used in combination with another trailer or semitrailer which is more than 42 feet in length.
Nev. Admin. Code § 484D.390
NRS 484D.615