S.C. Code Ann. § 25-1-2855: Sentence involving general officer.

No sentence involving a general officer or which includes unsuspended dismissal of a commissioned officer, or a dishonorable discharge, may be executed until affirmed on appeal, provided the defendant elects to appeal.

All other court-martial sentences, unless suspended or deferred, may be ordered executed by the convening authority when approved by him. The convening authority may suspend the execution of any sentence.