(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.
(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.