S.C. Code Ann. § 63-17-3080: Multiple registrations of orders.

In responding to registrations or petitions for enforcement of two or more child-support orders in effect at the same time with regard to the same obligor and different individual obligees, at least one of which was issued by a tribunal of another state or a foreign country, a tribunal of this State shall enforce those orders in the same manner as if the orders had been issued by a tribunal of this State.