27 C.F.R. § 19.643 Brand name, kind, alcohol content, and State of distillation.
Title 27 - Alcohol, Tobacco Products and Firearms
(a) Brand name and kind. The label of distilled spirits shall state the brand name and kind, as set out in 27 CFR part 5. (b) Alcohol content—(1) Mandatory statement. The label of distilled spirits shall state the alcohol content in percent-alcohol-by-volume. Products such as “Rock and Rye” or similar products containing a significant amount of solid material shall state the alcohol content at the time of bottling as follows: “Bottled at ___ percent-alcohol-by-volume.” (2) Optional statement. In addition, the label may also state the alcohol content in degrees of proof if this information appears in direct conjunction (i.e. with no intervening material) with the statement expressed in percent-alcohol-by-volume. If both forms of alcohol content are shown, the optional statement in degrees of proof shall be placed in parentheses, in brackets, or otherwise distinguished from the mandatory statement in percent-alcohol-by-volume to emphasize the fact that both expressions of alcohol content mean the same thing. (c) State of distillation—(1) Mandatory statement. If a whisky produced in the United States was not produced in the State shown on the label, the label shall show the State of distillation, except as provided by paragraph (c)(2) or (c)(3) of this section. The appropriate TTB officer may, however, require the State of distillation to be shown on the label or permit such other. labeling as may be necessary to preclude any misleading or deceptive impression which might otherwise be created as to the actual State of distillation. (2) Exceptions. The State of distillation is not required to be shown on labels of “blended whisky”, “a blend of straight whiskies”, “spirit whisky”, “light whisky”, or “blended light whisky”. The State of distillation may be prohibited on certain labels of “light whisky” or “blended light whisky”, in accordance with paragraph (c)(3) of this section. (3) Prohibited statement. The State of distillation may not be shown, except as part of the name and address required by 27 CFR 5.36(a), on labels of “light whisky” or “blended light whisky” produced in a State which the appropriate TTB officer finds to be associated by consumers with an American type whisky. (Sec. 201, Pub. L. 85–859, 72 Stat. 1356, as amended (26 U.S.C. 5201)
Title 27: Alcohol, Tobacco and Firearms
PART 19—DISTILLED SPIRITS PLANTS
Subpart S—Liquor Bottle and Label Requirements
Bottle Label Requirements
§ 19.643 Brand name, kind, alcohol content, and State of distillation.

