Basically, the night-time quiet rule is the same in huts as in town: the quiet period is from 10 pm to 6 am, and overnighters should adhere to it. Whether this rule is applied very strictly or less strictly depends on the category of hut you are staying in, which in turn is based on the altitude at which the hut is located. Anybody who has to set off on a climb before 6 am should notify the host in advance. And it should be self-evident: when you are departing, leave in such a way that you don’t wake the whole hut.