This document adopts as a final rule, with some changes, proposed amendments to the Customs Regulations that implement section 622 of the Customs Modernization provisions of the North American Free Trade Agreement Implementation Act concerning penalties for false drawback claims. The document sets forth: procedures that apply when false drawback claims are filed and penalties are thereby incurred; mitigation guidelines that Customs would follow in arriving at a just and reasonable assessment and disposition of liabilities when false drawback claims are filed and penalties are incurred; and more specific grounds and procedures for removing a participant from the drawback compliance program.