S.C. Code Ann. § 62-7-814
(c) Subject to subsection (d), and unless the application of this section is clearly and convincingly negated in the will, the trust document, terms of the trust, or a written instrument appointing a fiduciary, expressly indicating that a rule in this subsection does not apply, any power conferred upon the fiduciary, in his capacity as a fiduciary (and not including any power conferred upon him in his capacity as a beneficiary), which would, except for this section, constitute, in whole or in part, a general power of appointment cannot be exercised by him in favor of himself, his estate, his creditors, or the creditors of his estate.
(d) Subsection (c) does not apply to: