S.C. Code Ann. § 63-17-1430: Petitioning the court.

(A) An obligor may petition the court at any time prior to the occurrence of a delinquency seeking an order for income withholding procedures to begin immediately.

(B) Where the obligor makes payments directly to the obligee pursuant to an order for support and where income withholding procedures take effect, the provisions to pay directly are superseded by the withholding process and the obligor and the payor on behalf of the obligor during the period of withholding must pay this support through the State Disbursement Unit.