S.D. Codified Laws § 36-31A-14
This compact must be liberally construed so as to effectuate its purposes. The provisions of this compact are severable and if any phrase, clause, sentence, or provision of this compact is declared to be contrary to the constitution of any member state or of the United States, or the applicability to any government, agency, person, or circumstance is held invalid, the validity of the remainder of this compact and the applicability of this compact to any government, agency, person, or circumstance is not affected. If this compact is held to be contrary to the constitution of any member state, the compact must remain in full force and effect as to the remaining member states and in full force and effect as to the member state affected as to all severable matters.
SDCL 36-31A-14