1: There is no building code requirement that says an interior door is required, including bedroom doors(email from Joe Ortega to JB            Oct 2015) 
2: Section 8 DOES require them and they wrote "We do require there be some kind of door on bedrooms.
    If a tenant prefers to have some   kind of curtain, beads or nothing, we can pass with a comment and document it as a tenant                 preference"