(1) No ordinance, order, regulation or contract affecting solid waste management shall be adopted by a local government unit if such ordinance, order, regulation or contract conflicts with rules adopted by the Environmental Quality Commission under ORS 459.045 or 459A.025 or with a solid waste management plan or program adopted by a metropolitan service district and approved by the Department of Environmental Quality or any ordinances or regulations adopted under such plan or program.
(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.