In Diversified Investment Partnership v. Department of Social & Health Services, 113 Wn.2d 19, 27, 775 P.2d 947 (1989), the Court affirmed the mere fact an act does not take effect until a contingency arises does not a delegation of legislative power make, even where the contingency depends upon the action of certain persons. This is so because: "'The event or change of circumstances on which a law may be made to take effect must be such as, in the judgment of the legislature, affects the question of the expediency of the law; an event on which the expediency of the law in the opinion of the law-makers depends. On this question of expediency the legislature must exercise its own judgment definitely and finally. When a law is made to take effect upon the happening of such an event, the legislature in effect declare the law inexpedient if the event should not happen, but expedient if it should happen. They appeal to no other persons to judge for them in relation to its present or future expediency. They exercise that power themselves, and then perform the duty which the Constitution imposes upon them.'" Id.