When did alcohol per volume laws come in?

Alcohol by volume (ABV) laws began to emerge in the early 20th century, particularly during the Prohibition era in the United States (1920-1933), when the production and sale of Alcoholic Beverages were banned. However, many countries had established regulations regarding alcohol content prior to Prohibition, with the UK introducing the concept of "degrees" of alcohol content in the 19th century. The standardization of alcohol content measurements, including ABV, became more widespread in the latter half of the 20th century as consumer awareness and safety regulations increased.