S.C. Code Ann. § 44-52-30: Discharge of voluntary patient.

The head of the treatment facility may discharge a patient who has sufficiently improved so that the head of the treatment facility determines that hospitalization of the patient is no longer necessary.

The head of the treatment facility may also discharge any patient if to do so would, in his judgment, contribute to the most effective use of the facility in the care and treatment of chemically dependent persons.