Overnight stays?

Hi!
My boyfriend is coming flying for this summer, but on the housing website it says that “Overnight stays for one guest are limited to five days in any consecutive 30 day period. An overnight stay is defined as any stay within the hours of 11:00pm and 8:00am.” I was just wondering if it was possible to have someone stay overnight for more that 5 days.
Thank you for your help!
Feedback appreciated!