This document revises the Customs Regulations regarding drawback. The document revises the regulations to implement the extensive and significant changes to the drawback law contained in the Customs modernization portion of the North American Free Trade Agreement Implementation Act; to change some administrative procedures involving manufacturing and unused merchandise drawback, for the purpose of expediting the filing and processing of drawback claims thereunder, while maintaining effective Customs enforcement and control over the drawback program; and to generally simplify and improve the editorial clarity of the regulations.