26 U.S.C. § 5372
Sampling
Under regulations prescribed by the Secretary, wine may be utilized in any bonded wine cellar for testing, tasting, or sampling, free of tax.
(Added Pub. L. 85–859, title II, § 201 , Sept. 2, 1958 , 72 Stat. 1382 ; amended Pub. L. 94–455, title XIX, § 1906(b)(13)(A) , Oct. 4, 1976 , 90 Stat. 1834 .)