S.C. Code Ann. § 44-24-50

When admitted to the residential program or facility, thirty days after the date of admission, and every six months after, a voluntarily admitted child must be informed in writing of his right to release in language which is appropriate for his age. The child shall sign a statement to that effect which becomes a part of that child's record. The child's parent or legal guardian or other interested person must be informed also and shall sign a statement to that effect which becomes a part of the child's record.