Oregon Revised Statutes Public Lands § 271.775

The board or officer administering a state agency or the governing body of any county, metropolitan service district, soil and water conservation district, city or park and recreation district or of a county service district established under ORS 451.410 to 451.610 to construct, maintain and operate service facilities in Washington or Clackamas Counties for the purposes specified in ORS 451.010 (1)(a) and (b) and in Washington County for the purpose specified in ORS 451.010 (5) may make and enforce reasonable rules, regulations, orders or ordinances governing the care, use and management of its conservation easements and highway scenic preservation easements.