Mississippi Code Title 41. Public Health § 41-30-21

Any person may voluntarily apply for treatment for alcoholism, drug addiction, substance dependency or drug dependency, directly to any approved public or private treatment facility. If the patient is a minor or an incompetent, the application for voluntary inpatient, intermediate, or outpatient treatment, and the request for discharge from an inpatient institution, shall be made by his parent, legal guardian, or other representative.