S.C. Code Ann. § 44-52-165
(A) It is unlawful for a patient receiving inpatient services in a program under the jurisdiction of the division in a treatment facility operated by the South Carolina Department of Mental Health to possess alcoholic beverages, firearms, dangerous weapons, or controlled substances as defined by Section 44-53-110. A patient who violates the provisions of this section while in a treatment facility is guilty, in the case of:
(B) A person who intentionally or negligently allows a patient, as defined in subsection (A), access to or possession of items in violation of that subsection or who attempts to furnish: