Every export warehouse proprietor who desires to discontinue operations and close out his warehouse shall dispose of all cigars, cigarettes, and cigarette papers and tubes on hand, in accordance with this part, making a closing inventory and closing report, in accordance with the provisions of §§ 44.146 and 44.151 , respectively, and surrender, with such inventory and report, his permit to the appropriate TTB officer as notice of such discontinuance, in order that the appropriate TTB officer may terminate the liability of the surety on the bond of the export warehouse proprietor.
27 C.F.R. § 44.161
72 Stat. 1422; 26 U.S.C. 5721 , 5722