(2) By rule, the commission may designate as chemical for the purposes of ORS 475.405 to 475.495 any element, compound, mixture or solution that may be a controlled substance or precursor substance as defined by ORS 475.005 to 475.285 and 475.744 to 475.980 or used to illegally manufacture drugs. [1987 c.699 §3; 1995 c.440 §9]