Our volunteers go by dress code developed and emplemented by my deapartment (as each department does in our medical center) and approved by leadership. It mirrors the staff dress code - no shorts,jeans, mini skits, capri etc. a few exceptions just as with staff.
We continue to struggle with Auxiliary members who have been here for a number of years demanding Auxiliary control the dress code.
My thoughts would be that if staff can wear Capri pants in non patient areas then same should be true for volunteer.
Good luck