Oregon Revised Statutes Aviation § 836.505

(1) Landing places for aircraft may from time to time be designated, set apart and marked by the Oregon Department of Aviation or other public officials who are in charge of any land owned or controlled by the state or by any municipality, or park commission.

(2) Such officials may make reasonable rules and regulations subject to the approval of the State Aviation Board governing the use of the landing places by aviators and other persons, and may change the rules and regulations from time to time. The rules and regulations shall be such as will promote the safe and orderly use of the airports affected. All aviators and other persons using such landing places shall at all times comply with all such rules and regulations.