S.C. Code § 40-45-620
This compact must be liberally construed so as to effectuate the purposes thereof. The provisions of this compact must be severable and if any phrase, clause, sentence or provision of this compact is declared to be contrary to the constitution of any party state or of the United States or the applicability thereof to any government, agency, person, or circumstance is held invalid, the validity of the remainder of this compact and the applicability thereof to any government, agency, person, or circumstance may not be affected thereby. If this compact must be held contrary to the constitution of any party state, the compact shall remain in full force and effect as to the remaining party states and in full force and effect as to the party state affected as to all severable matters.
S.C. Code § 40-45-620