The following limitations shall apply:

1. (1) No facility shall be connected to any other building; and

2. (2)

   1. (A) Occupancies not under the control of, or necessary to the administration of, a facility are prohibited therein with the exception of the residence of the manager.
   2. (B) This limitation shall not be applied to guests of clients, who may be invited to stay overnight by clients, subject to the availability of suitable accommodations in the facility.