S.C. Code Ann. § 44-24-50: Periodic notification to voluntarily admitted child and parent or guardian of right to release.

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.