49 U.S.C. § 30144

(a) General .— Section 30112(a) of this title does not apply to a motor vehicle imported on a temporary basis for personal use by an individual who is a member of— (1) (A) the personnel of the government of a foreign country on assignment in the United States or a member of the Secretariat of a public international organization designated under the International Organizations Immunities Act ( 22 U.S.C. 288 et seq.); and (B) the class of individuals for whom the Secretary of State has authorized free importation of motor vehicles; or (2) the armed forces of a foreign country on assignment in the United States. (b) Verification .— The Secretary of Transportation or the Secretary of the Treasury may require verification, that the Secretary of Transportation considers appropriate, that an individual is a member described under subsection (a) of this section. The Secretary of Transportation shall ensure that a motor vehicle imported under this section will be exported (at no cost to the United States Government) or abandoned to the Government when the individual no longer— (1) resides in the United States; and (2) is a member described under subsection (a) of this section. (c) Sale in the United States .— A motor vehicle imported under this section may not be sold when in the United States.