Wash. Rev. Code § 18.17.130
This compact shall be liberally construed so as to effectuate the purposes thereof. The provisions of this compact shall be 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 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 shall not be affected thereby. If this compact shall be held contrary to the Constitution of any member state, the compact shall 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.
RCW 18.17.130