Va. Code § 46.2-670
No person shall be required to obtain the registration certificate, license plates, or decals for or pay a registration fee for any motor vehicle, trailer, or semitrailer owned by a farm owner when the vehicle is operated or moved along a highway for no more than 75 miles between a sawmill or sawmill site and his farm to transport sawdust, wood shavings, slab wood, and other wood wastes. The provisions of this section shall only apply to (i) pickup or panel trucks; (ii) sport utility vehicles; (iii) vehicles other than pickup or panel trucks, sport utility vehicles, trailers, or semitrailers having a gross vehicle weight rating greater than 7,500 pounds; and (iv) trailers and semitrailers. The owner or lessee of a pickup or panel truck or sport utility vehicle claiming the exemption provided pursuant to this section shall be required to obtain a permanent farm use placard pursuant to § 46.2-684.2.
Va. Code § 46.2-670