(a) Within a reasonable time after move-in, the administrator shall be responsible for the development of a written service plan based on the initial assessment. The service plan shall include at least:
(1) The services and interventions needed;
(2) Description, frequency and duration of the service or intervention; and
(3) Party responsible for arranging the service.
(b) The service plan shall be developed by a qualified person and shall be signed by both parties. The service plan shall be reviewed by both parties periodically and each time a resident’s condition changes significantly and all changes shall be acknowledged in writing by both parties.