27 C.F.R. § 24.244 Use of acid to stabilize standard wine.
Title 27 - Alcohol, Tobacco Products and Firearms
Standard wine other than citrus wine, regardless of the fixed acid level, may be stabilized as a part of the finishing process by the addition of citric acid within the limitations of §24.246. Standard wine (including citrus wine) may be stabilized by the addition of fumaric acid within the limitations of §24.246. (Sec. 201, Pub. L. 85–859, 72 Stat. 1383, as amended (26 U.S.C. 5382))
Title 27: Alcohol, Tobacco and Firearms
PART 24—WINE
Subpart L—Storage, Treatment and Finishing of Wine
§ 24.244 Use of acid to stabilize standard wine.