> I also wonder whether the roof rule was written preemptively or retrospectively -- I hope the former.

Presume you're referring to [1], not the page you linked, and one might be inclined to accuse you of __feigning surprise__ but if not: using the roof is a quite common expectation in mid-rise buildings in big cities like NY, though not usually in a building you don't yourself own/lease in.

1. https://www.recurse.com/code-of-conduct