Does anyone regulate alcohol percentage

They have to list within a certain range, i.e within 0.5%

I don;t know what it is in the US though. I'm sure orval (might be a different belgian brewer though) list higher for their US beers than the EU ones, despite it being the same beer - as it ferments in the bottle it gets higher and I assume listing it higher than it actually might be when they import it is less of a problem than letting it get higher than the EU listed abv

 

I brought this up one time and was told by basically everyone that the amount the ABV rises is so miniscule, it's hardly worth mentioning. I brought it up because I wondered at the futility of labeling ABV% on bottle conditioned beers. I think the basic explanation was that there's really no malt left to be fermented, just 'conditioning sugars' or something like that (I'm not a homebrewer).

 

another thread jesskiddin has discussed many times. yes its tested and checked and regulated, etc etc. again states, and all that jazz.
http://www.ttb.gov/beer/
http://www.ttb.gov/ssd/labeling_methods.shtml

 

It's pretty small, less than 1%, but if your country's laws state that it must be quite exact then that poses a problem for bottle conditioned beers. My homebrew will gain about 0.1 to 0.2 % in abv when bottling conditioning

But orval has brett in it which will continue to ferment sugars that normal brewers yeast can't, so it might go up 0.5% or so or a bit more - not much really, but if the legal limit is only say 0.3% then that's troublesome

Most excise tax departments will probably only really care if a producer is selling a drink that is over its stated abv - if it's less then they won't care as much

 

I would suggest that you don't put beers in the freezer, doesn't take a lot of effort to put them in the fridge the day before. I actually have a small fridge in the basement that I keep at 50 degrees for stouts and porters so I don't have to let them warm up. The fridge upstairs is colder for food, and I can keep other beers colder. Putting beers in the freezer is asking for trouble.