This document adopts as a final rule, with modifications set forth in this document, amendments proposed to title 19 of the Code of Federal Regulations with respect to the requirements applicable to the operation of Class 9 bonded warehouses, which are also known as "duty- free sales enterprises" or "duty-free stores." The amendments in this document will extend the blanket withdrawal procedure for duty- free merchandise under certain circumstances and expand and create a uniform time period for Class 9 proprietors to file an entry, provide written confirmation of certain shortages, overages, and damages, and to pay duties, taxes, and interest on overages and shortages. The amendments in this document will also permit Class 9 warehouses to utilize existing technological systems more effectively. In addition, this document sets forth technical amendments to the applicable regulations to extend the time period for which merchandise may remain in a bonded warehouse under certain circumstances. The amendments will facilitate the efficient operation of Class 9 warehouses and also ensure adequate records are maintained for U.S. Customs and Border Protection ("CBP") trade enforcement purposes.