paying rent with 529 funds

My son had dropped out of college and started working. He is working for Disney, and is going to re-enroll in an online university. I have checked, and the school is valid for 529. His tuition will be fully covered by Disney. With the furlough, he will be going full time at least for a quarter, and possibly more. Because he is full time, he is no longer a dependent. With that background, can we still use the 529 towards his rent? I am not sure how his not being a dependent affects this, and also if only attending online impacts the ability to use the funds towards room expenses.