In the U.S., ABV is controlled by local legislation - similar to why there are still dry counties in certain states. That said, generally for wine, beer and spirits, ABV categorization is set at the state level. U.S. brewers, like Anheuser Busch, Miller... will produce different levels of alcohol beer for certain local markets, assuming they want to be in those markets. The joke here is not all Budweiser is the same.
To further confuse things, our federal BATF (Bureau of Alcohol, Tobacco & Firearms) supports local legislation, as is ideally the role of the federal government, though also dictates some things with their heavy hand. Bottle size is one. For spirits, 50ml, 100ml, 200ml, 375ml, 750ml, 1.0L and 1.75L are currently the standard and have been for about 30 years. Thus, all those glorious malts bottled in 700ml bottles cannot be legally imported into the U.S. Thus Scottish bottlers must make special bottle runs if they want to export to the U.S.
Another control of the BATF is the back, or strip, label which requires the brilliant Surgeon General warning that goes something like this: Drinking too much alcohol can increase your chance of crashing your tractor into your barn and can cause pregnancy by making pretty girls out of dogs.