This document amends the U.S. Customs and Border Protection (CBP) regulations to reflect an extension of import restrictions on certain archaeological and ecclesiastical ethnological material from Bulgaria. The restrictions, which were originally imposed by CBP Dec. 14-01, are due to expire on January 14, 2019. The Assistant Secretary for Educational and Cultural Affairs, United States Department of State, has made the requisite determination for extending the import restrictions that previously existed and entering into a new Memorandum of Understanding (MOU) with Bulgaria to reflect the extension of these import restrictions. The new MOU supersedes and replaces the existing agreement that became effective on January 14, 2014. This new MOU also corrects an inconsistency existing between the previous MOU and the Designated List that describes the types of archaeological and ecclesiastical ethnological material to which the restrictions apply.