"unless you are living in the home at the same time." What are the conditions for living in the home at the same time? What if my roomate is out of town and I'

"unless you are living in the home at the same time." What are the conditions for living in the home at the same time? What if my roomate is out of town and I'm the role of the host? Can the room still be rented? Does leaving for a few days really mean that I'm not living in the home?