Nathan Elkins purports to be a serious academic numismatist, but CPO has had its doubts ever since the release of his academic diatribe directed against a non-profit that uses ancient Roman coins to teach kids about history. CPO now has more such doubts based on Elkins' latest claim that "Clearly existing import restrictions are at pains to restrict only regional and locally circulating types, such as the provincial coins, while more broadly circulating types such as republican and imperial denarii are not included in restrictions."
And so would any serious academic numismatist who reviews the State Department and Customs designated lists that (with the exception of the Greek list that leaves off gold and some silver coins) restrict all coins made in Cyprus, China, Italy, Greece, and Bulgaria over periods of hundreds and hundreds of years.
For example, does Elkins really believe each and every coin type placed on the Bulgarian designated list (including those of gold and silver) only circulated "locally and regionally" within the confines of the modern Bulgarian nation state? Let's hope not. CPO therefore challenges Dr. Elkins to either explain his statement with respect to such coins or to retract it.