If a new student is accompanied upon arrival, are the guest(s) allowed to stay in the dorms? - CMU

Students are required to request authorization in writing prior to having guests staying with them. The maximum length of stay is 2 nights without extra charges. For every extra night there will be a fee of $50. Please note that students staying in double occupancy rooms cannot have guests staying over.
The student is responsible for his/her guests. Any necessary charges can and will be applied to the students account in the event that the rules are not followed accordingly.