If a patient of a mental health treatment agency works, this work shall be in the patient’s interest. If the primary purpose of this work is to benefit the mental health treatment agency or any agency of the state, the patient shall be employed and paid in accordance with law. If the purpose of the work is therapeutic, the patient may or may not be paid as circumstances indicate. This therapeutic work shall be part of a planned program of treatment described in the patient’s record with the rationale for the work-treatment included. It shall be periodically reviewed by the appropriate agency review procedures. The term "work" does not mean matters of personal housekeeping or personal maintenance.