S.C. Code Ann. § 20-7-762
(C) Unless services are to terminate earlier, the department shall schedule a review hearing before the court at least once every twelve months to establish whether the conditions which required the initial intervention exist. If the conditions no longer exist, the court shall order termination of protective services, and the court's jurisdiction shall end. If the court finds that the conditions which required the initial intervention are still present, it shall establish:
(5) the date when treatment goals must be achieved and court jurisdiction ends.
The court order shall specify a date upon which jurisdiction will terminate automatically, which must be no later than eighteen months after the initial intervention. Jurisdiction may be extended pursuant to a hearing on motion by any party, if the court finds that there is clear and convincing evidence that the child is threatened with harm absent a continuation of services.