Antique Car Regulations, U.S. citizens employed abroad or government employees returning on TDY or voluntary leave may import a foreign-made car free of duty provided they enter the United States for a short visit, claim nonresident status, and export the vehicle when they leave. Military and civilian employees of the U.S. government returning at the end of an assignment to extended duty outside U.S. Customs and Border Protection (CBP) territory of the United States may include a conforming vehicle among their duty-free personal and household effects. The vehicle must have been purchased abroad and be in its owner’s possession prior to departure. Generally, extended duty is 140 days or more. Navy personnel serving aboard a U.S. naval vessel or a supporting naval vessel from its departure from the United States to its return after an intended overseas deployment of 120 days or more are entitled to the extended-duty exemption. Conforming vehicles imported under the duty-free exemption are dutiable if sold within one year of importation. Duty must be paid at the most convenient CBP office before the sale is completed.