S.C. Code Ann. § 44-26-40: Determination of competency to consent to or refuse major medical treatment.

If a client resides in a facility operated by or contracted to by the Office of Intellectual and Developmental Disabilities, the determination of that client's competency to consent to or refuse major medical treatment must be made pursuant to Section 44-66-20 of the Adult Health Care Consent Act. The office shall abide by the decision of a client found competent to consent.