(1) The facility must provide sufficient direct care staff to manage and supervise each client in accordance with their individual treatment plan.
(2) Direct care staff must be provided by the facility in the following minimum ratios of direct care staff to clients:
(a) a staff to client ratio of 1 to 3.2 for each defined residential living unit serving:
(i) any severely and profoundly retarded client;
(ii) a client with severe physical disabilities;
(iii) any client who is aggressive, assaultive , or a security risk; or
(iv) any client who manifests severely hyperactive or psychotic-like behavior.
(b) for each defined residential living unit who serves any moderately retarded client, the staff to client ratio is 1 to 4.
(c) for each defined residential living unit who serves any client who functions within the range of mild retardation, the staff to client ratio is 1 to 6.4.
(3) The above staff to client ratios shall be calculated for each defined residential living unit based on the number of direct care staff who are present and on-duty during all shifts in a 24 hour period.