Fla. Stat. § 320.371
The provisions of this chapter which relate to registration and display of license number plates do not apply to any new automobile or truck, the equitable or legal title to which is vested in a manufacturer, distributor, importer, or exporter and which has never been transferred to an ultimate purchaser, if the vehicle is in the care, custody, and control of a vehicle servicing, processing, and handling agency or organization for the performance of such services and the export of such vehicle from the state or its distribution in the state, provided such agency or organization conspicuously displays on the vehicle its name and address on a temporary 5-inch by 12-inch sign that includes the legend "has custody of this vehicle." Nothing in this section may be construed to relieve such vehicle servicing, processing, and handling agency or organization which has such custody and control of such vehicle from complying with and abiding by all other applicable laws, rules, and regulations relating to safety of operation of motor vehicles and the preservation of the highways of this state.
Fla. Stat. § 320.371