Haw. Rev. Stat. § 431:30-124: Binding effect of the compact.

(a) All lawful actions of the commission, including all rules and operating procedures adopted by the commission, are binding upon the compacting states.

(b) All agreements between the commission and the compacting states are binding in accordance with their terms.

(c) Upon the request of a party to a conflict over the meaning or interpretation of commission actions, and upon a majority vote of the compacting states, the commission may issue advisory opinions regarding such meaning or interpretation.

(d) If any provision of this compact exceeds the constitutional limits imposed on the legislature of any compacting state, the obligations, duties, powers, or jurisdiction sought to be conferred by such provision upon the commission shall be ineffective as to such compacting state, and such obligations, duties, powers, or jurisdiction shall remain in the compacting state and shall be exercised by the agency thereof to which such obligations, duties, powers, or jurisdiction are delegated by law in effect at the time this compact becomes effective.