1. If a statute does not satisfy the due–process requirement of giving decent advance notice of what it is which, if happening, will be visited with punishment, so that men ×17 may presumably have an opportunity to avoid the happening . . ., then ‘willfully‘ bringing to pass such an undefined and too uncertain event cannot make it sufficiently definite and ascertainable. ‘Willfully‘ doing something that is forbidden, when that something is not sufficiently defined according to the general conceptions of requisite certainty in our criminal law, is not rendered sufficiently definite by that unknowable having been done ‘willfully‘. In detailing the logical steps taken to arrive at this conclusion, reference may be made to cases arising out of legislation based on the Model Drug Paraphernalia Act supported by Amici Arkansas, et. al.