The Boston Museum of Fine Arts has listed several Greek and Roman coins with varying amounts of provenance information on the AAMD Object Registry. See http://aamdobjectregistry.org/taxonomy/term/70
The Greek and Roman coins struck in Italy carry the following note,
Per the MFA’s 2006 agreement with the Italian Ministry of Culture, the Museum contacted Ministry representatives prior to acquiring the coin; the Ministry raised no objection to the acquisition.
During his testimony at CPAC, Stefano De Caro referenced the Ministry of Culture's consent to the MFA's accession of these coins, presumably to show how "reasonable" the Italian Cultural Bureaucracy can be.
But if the Italian Ministry of Culture wishes to be "reasonable," why require U.S. collectors to certify the provenance of ancient Roman and Greek coins struck in Italy before import, particularly when there is NO REQUIREMENT that Italian collectors do the same for coins they collect?