In this subchapter:
(1) "Elderly resident" means a person 65 years of age or older residing in a department facility.
(2) "Extended care unit" means a residential unit in a department facility that contains patients with chronic mental illness who require long-term care, maintenance, limited programming, and constant supervision.
(3) "Transitional living unit" means a residential unit that is designed for the primary purpose of facilitating the return of hard-to-place psychiatric patients with chronic mental illness from acute care units to the community through an array of services appropriate for those patients.