S.C. Code § 9-3-570
The contribution fund shall be established and held separate and apart from any other funds or moneys of the State and shall be used and administered exclusively for the purpose of this chapter. Withdrawals from such fund shall be made for, and solely for (a) payment of the amounts required to be paid to the Secretary of the Treasury pursuant to an agreement entered into under Sections 9-3-110 and 9-3-120, (b) payment of refunds provided for in Section 9-3-510 and (c) refunds of overpayments, not otherwise adjustable, made by a political subdivision or instrumentality.
From the contribution fund the custodian of the funds shall pay to the Secretary of the Treasury such amounts and at such time or times as may be directed by the State agent, in accordance with any agreement entered into under Sections 9-3-110 and 9-3-120 and the Social Security Act.
S.C. Code § 9-3-570