(a) General. In addition to the marks and brands required to be placed on packages and cases of distilled spirits at the time they are filled under the provisions of part 19 of this chapter, the proprietor shall mark the word “Export” on the Government side of each case or Government head of each container before removal from the bonded premises for any exportation authorized under this subpart.

(b) Exception. When containers are being removed to a contiguous manufacturing bonded warehouse, the proprietor need not place the word “Export” on the containers if the appropriate TTB officer finds the omission will not jeopardize the revenue.