Editing Alcohol proof (section)

===European Union===
The [[European Union]] (EU) follows recommendations of the [[International Organization of Legal Metrology]] (OIML). OIML's International Recommendation No. 22 (1973)<ref>{{cite book |title=Recommendation No. 22, International Alcoholmetric Tables |publisher=International Bureau of Legal Metrology |location=Paris |url=http://www.oiml.org/en/files/pdf_r/r022-e75.pdf |archive-url=https://web.archive.org/web/20131104060309/http://www.oiml.org/en/files/pdf_r/r022-e75.pdf |archive-date=2013-11-04 |url-status=live }}</ref> provides standards for measuring alcohol strength by [[volume]] and by [[mass]]. A preference for one method over the other is not stated in the document, but if alcohol strength by volume is used, it must be expressed as a percentage of total volume at a temperature of {{cvt|20|C}}. The document does not address alcohol proof or the labeling of bottles.