2015 ORS § 547.040¹
Application of Act of 1915 and amendments to districts organized under earlier laws

All drainage districts organized before February 14, 1921, in pursuance of any law relating to drainage districts passed prior to the enactment of chapter 340, Oregon Laws 1915, shall have all the powers and be subject to all the provisions of the Drainage District Act, except in so far as the organization of the district is concerned.