Move-In 2015

One thing that my S told me I did not like. A student from his floor camped out at my S’s room one night because that student’s roommate had a girlfriend there. I don’t know if that student volunteered to go somewhere else or not but I told my son that there should be some discussion/agreement between the roommates about the situation. Is there a Housing visitor rule about this somewhere?

http://www.ou.edu/content/dam/HousingFood/Documents/CLG.2015.pdf

Thanks!