brothers cannot have beards (the beard rule I think is pretty much US-only though)
Nope. The beards were (an still is, I guess) an issue here in Norway as well. If you had a beard, or something other hairy stuff in your face, you were not to have any privileges. One new brother in my hall (really nice guy with adorable family, also new), had a moustache for a long time. One day he shaved it off. Two weeks later (or so it seemed) he was an MS.
I can't remember any dress rules, though.
Its the same here in Britain.
I remember seeing a brother in the Kingdom Hall being told by an Elder, that as long as he had a beard, he would not be allowed on the platform. Also that no one would be allowed to work with him on the field ministry. The guy only had a small goatee !!
Yet I had a mustache all the time I was a JW , no one ever told me to shave it off or even made a comment, even when I became a Min Servant.
We had the usual brothers had to wear suits rule. But we could wear whatever coloured shirt we liked. I never ever wore white shirts.
There was a rule about ties, they had to be plain and dark colours. Then a CO turned up who wore the most brightly coloured, patterned ties you can imagine. The Elders never said a word after he had been.
But I have learnt how things can be different in other congregations. Each one seems to make up its own rules on dress, depending on the attitude of the local Elders.