27 C.F.R. § 19.170
Liability under operations bonds, withdrawal bonds, and unit bonds may be terminated for future withdrawals, future production, or future deposits as set forth below:
(e) On application by an existing proprietor who becomes exempt from bond requirements. If a proprietor has held a bond or bonds covering operations or withdrawals of distilled spirits for nonindustrial use and becomes exempt from those bond requirements as provided under § 19.151(d), the proprietor may apply to TTB to terminate the bond or bonds covering such operations or withdrawals. To apply, the proprietor must file an amendment to TTB F 5110.41, Registration of Distilled Spirits Plant, as provided in § 19.136. The proprietor must accurately state in the submission that the proprietor:
(3) Was liable for not more than $50,000 in such taxes in the preceding calendar year.
(26 U.S.C. 5173)
[T.D. TTB-92, 76 FR 9090, Feb. 16, 2011, as amended by T.D. TTB-146, 82 FR 1121, Jan. 4, 2017]