This document adopts as a final rule, without change, the interim rule amending the Customs Regulations that was published in the Federal Register on December 2, 1999, as T.D. 99-87. The interim rule set forth the form and manner by which an importer establishes that a valid export certificate is in effect for certain fresh, chilled or frozen lamb meat that is the subject of a tariff-rate quota, and the product of a participating country, as defined in interim regulations of the United States Trade Representative (USTR). The export certificate enables the importer to claim the in-quota rate of duty on the lamb meat.