S.C. Code Ann. § 63-17-3230: Governing law determination.

Except as otherwise provided in this article, a responding tribunal of this State shall:

(1) apply the procedural and substantive law generally applicable to similar proceedings originating in this State and may exercise all powers and provide all remedies available in those proceedings; and

(2) determine the duty of support and the amount payable in accordance with the law and support guidelines of this State.