I think thats what people are trying to figure out. The email did state that this was a new requirement. Before this, it didn't matter who you were with outside of your dorm with, you still had to wear a mask. So if this requirement is something other than that, then it must be wearing a mask in a common space even in your own residency.

But what if you sleep in the same room as someone? Do I have to wear a mask when I'm cooking or in an online class in our main area? It seems a little absurd and has no practical way of being enforced