This document amends U.S. Customs and Border Protection (CBP) regulations to reflect the extension of import restrictions on certain archaeological materials from Guatemala. These restrictions, which were last extended by CBP Dec. 07-79, are due to expire on September 29, 2012, unless extended. The Assistant Secretary for Educational and Cultural Affairs, United States Department of State (Department of State), has determined to extend the bilateral Agreement between the Republic of Guatemala and the United States to continue the imposition of import restrictions on the archaeological materials from Guatemala and to add restrictions on certain ethnological materials. The Designated List of cultural property described in Treasury Decision (T.D.) 97-81 is revised in this document to reflect the addition of the ethnological materials. The import restrictions imposed on the archaeological and ethnological materials covered under the Agreement will be in effect for a 5-year period, and the CBP regulations are being amended accordingly. These restrictions are being imposed pursuant to determinations of the Department of State under the terms of the Convention on Cultural Property Implementation Act in accordance with the United Nations Educational, Scientific and Cultural Organization (UNESCO) Convention on the Means of Prohibiting and Preventing the Illicit Import, Export and Transfer of Ownership of Cultural Property.