27 CFR §27.58

Labels on imported containers of distilled spirits, and on containers of imported distilled spirits bottled in customs custody, for sale at retail, are required to be covered by a certificate of label approval TTB Form 5100.31 issued pursuant to part 5 of this chapter. Containers of imported distilled spirits bottled after taxpayment and withdrawal from customs custody are required to be covered by a certificate of label approval or a certificate of exemption from label approval TTB Form 5100.31 issued pursuant to part 5 of this chapter. When distilled spirits are to be labeled under a certificate of exemption from label approval, the labels affixed to containers are required to conform to the provisions of part 19 of this chapter.