S.C. Code § 9-3-160
A referendum having been held pursuant to Section 9-3-150 among the members of the judiciary participating in the judges' retirement system provided for in Sections 9-7-10 to 9-7-90, and the official authorized to approve payments of warrants for the salaries of the justices and judges having entered into an agreement pursuant to the provisions of this chapter, with the State agent for social security to effectuate such coverage for justices and judges, the State Treasurer shall pay out of the general funds in the State Treasury, on the warrant of such official authorized to approve payments of warrants for the salaries of the justices and judges, such funds as may be necessary, from time to time, as employer contributions by the State under such agreement.
S.C. Code § 9-3-160