(1) Each mental health center providing a mental health group home or a crisis intervention stabilization facility must ensure that no more than four residents reside in a single bedroom. Each multi-bedroom must contain at least 80 square feet per bed, exclusive of toilet rooms, closets, lockers, wardrobes, alcoves, or vestibules. Each center must further provide:

(a) one toilet for every four residents;

(b) a toilet and sink in each toilet room;

(c) one bathing facility for every 12 residents; and

(d) showers and tubs with non-slip surfaces.

(2) Any provision of this rule may be waived at the discretion of the department if conditions in existence prior to the adoption of this rule or construction factors would make compliance extremely difficult or impossible and if the department determines that the level of safety to residents and staff is not diminished.