Editing Alcohol proof (section)

===United States===
In the United States, alcohol content is legally mandated to be specified as an ABV percentage. For bottled spirits over {{Convert|100|ml|abbr=on}} containing no solids, actual alcohol content is allowed to vary by up to 0.15% of the ABV stated on the label. By contrast, bottled spirits which are less than 100 ml (as well as those which otherwise contain solids) may vary by up to 0.25%.<ref name="Title27">{{cite book |date=1 April 2000 |chapter=Title 27 Alcohol, Tobacco and Firearms, Chapter 1, §5.37 |title=Code of Federal Regulations |publisher=Bureau of Alcohol, Tobacco and Firearms; Department of the Treasury |chapter-url=https://www.govinfo.gov/content/pkg/CFR-2000-title27-vol1/pdf/CFR-2000-title27-vol1-sec5-37.pdf |archive-url=https://web.archive.org/web/20210304182449/https://www.govinfo.gov/content/pkg/CFR-2000-title27-vol1/pdf/CFR-2000-title27-vol1-sec5-37.pdf |archive-date=2021-03-04 |url-status=live |page=61}}</ref> Proof (the term ''degrees proof'' is not used), defined as being twice the percentage of alcohol by volume, may be optionally stated in conjunction with the ABV. For example, whisky may be labeled as 50% ABV and as 100 proof; 86-proof [[whisky]] contains 43% ABV.<ref name=scotch/> The most typical bottling proof for spirits in the United States is 80 US proof, and there is special legal recognition of 100-proof spirits in the [[bottled in bond]] category defined since 1897.

The [[Code of Federal Regulations]]<ref>{{nowrap|27 CFR}} {{nowrap|[4-1-03 Edition]}} §&nbsp;5.37 ("Alcohol content")</ref> requires that liquor labels state the percentage of ABV at a temperature of {{cvt|60|F}}. The regulation permits, but does not require, a statement of the proof, provided that it is printed close to the ABV number.<ref name="Title27"/> In practice, proof levels continue to be stated on nearly all spirits labels in the United States, and are more commonly used than ABV when describing spirits in journalism and informal settings.{{Citation needed|date=August 2023}}