If a halfway hut was a rule breach I suspect that they would have ceased to exist years ago or be closed for all competition rounds
At a previous club their hut was never open on a competition day of any sort, when it was open the competition of the day was then non-qualifying due to, as what was told to me by the HS, a rule breach if you unduly delayed yourself or caused a delay to others!
I suppose if a group in front stopped and had something to eat & drink that took 5-10 minutes but then the following group didn't wish to use the hut, you would then have a delay situation with 2 groups on the 10th tee!
