Code of Federal Regulations Title 22. Foreign Relations § 22.72.27 Export of cultural property;  handling other property when export, possession, or import may be illegal

(a) A consular officer should not ship, or assist in the shipping, of any archeological, ethnological, or cultural property, as defined in 19 U.S.C. 2601, that the consular officer is aware is part of the personal estate of a United States citizen or non-citizen national to the United States in order to avoid conflict with laws prohibiting or conditioning such export.

(b) A consular officer may refuse to ship, or assist in the shipping, of any property that is part of the personal estate of a United States citizen or non-citizen national if the consular officer has reason to believe that possession or shipment of the property would be illegal.