S.C. Code Ann. § 62-7-112
A revocable inter vivos trust may be created either by declaration of trust or by a transfer of property and is not rendered invalid because the trust creator retains substantial control over the trust including, but not limited to, (1) a right of revocation, (2) substantial beneficial interests in the trust, or (3) the power to control investments or reinvestments. Nothing herein, however, shall prevent a finding that a revocable inter vivos trust, enforceable for other purposes, is illusory for purposes of determining a spouse's elective share rights under Section 62-2-201 et seq. A finding that a revocable inter vivos trust is illusory and thus invalid for purposes of determining a spouse's elective share rights under Section 62-2-201 et seq. shall not render that revocable inter vivos trust invalid, but would allow inclusion of the trust assets as part of the probate estate of the trust creator only for the purpose of calculating the elective share and would make available the trust assets for satisfaction of the elective share only to the extent necessary under Section 62-2-207.
PART 2. JURISDICTION OF COURTS CONCERNING TRUSTS