Oregon Revised Statutes Oregon Vehicle Code § 801.310

“Implement of husbandry” means a vehicle or device used exclusively in agricultural operations. Truck trailers with a loaded weight of more than 8,000 pounds, motor vehicles, bus trailers, manufactured dwellings, prefabricated structures and recreational vehicles greater than eight and one-half feet in width and travel trailers are not implements of husbandry unless limited by design to agricultural uses.