>> encouraged to wear a hat and jacket
“How do we know Yaakov Avinu weared a shterimel? – VeYetze Yaakov ni Beer Sheva …”
Both sources seem to stress the focus on local customs and how one would approach an important person. No bare legs (back to this thread). Sh’A is also directing this to Chachamim and their students. These days, we don’t seem to even bother mention this qualification, but it used to be a difficult one to achieve.