(2) Solid waste management regulations adopted by a sanitary district or sanitary authority shall be limited to regulations supplemental to the rules adopted by the commission under ORS 459.045 or 459A.025 and necessary to meet special local conditions. [1971 c.648 §17; 1973 c.835 §139; 1977 c.95 §7; 1993 c.560 §16]