27 C.F.R. § 44.227
The customs officer shall satisfy himself that the tobacco products, and cigarette papers and tubes described on the Form 5620.7 and those inspected by him are the same and shall note on the form any discrepancy. After having inspected the articles and supervised the lading thereof on the export carrier, the customs officer shall complete and sign the certificate of inspection and lading on both copies of Form 5620.7 and deliver or transmit such copies to the office of his district director of customs for further processing. After clearance from the port of the export carrier on which the articles are laden, the district director of customs shall execute the certificate of exportation on both copies of Form 5620.7. The district director of customs shall retain one copy of the form for his records and transmit the other copy to the appropriate TTB officer.
27 C.F.R. § 44.227
72 Stat. 1419; 26 U.S.C. 5706