Va. Code § 46.2-1551
Notwithstanding the provisions of § 46.2-1550, dealer's license plates or temporary transport plates may be used on tractor trucks or trucks for the purpose of delivering these vehicles to another establishment for the purpose of having a fifth wheel, body, or any special permanently mounted equipment installed on the vehicles, and for the purpose of returning the vehicle to the dealer whose plates are attached to the tractor truck or truck whether or not the title to the vehicle has been retained by the dealer, and no other license, permit, warrant, exemption card, or classification plate from any other agency of the Commonwealth shall be required under these circumstances. No other statute or regulation in conflict with the provisions of this section shall be applicable to the extent of the conflict. This section shall also apply to trips into the Commonwealth by a vehicle owned and operated outside the Commonwealth to an establishment within the Commonwealth and to the return trip of that vehicle from the Commonwealth to another state, provided the operator of the vehicle carries on his person when so operating a bill of sale for the fifth wheel, body, or special equipment.
Va. Code § 46.2-1551