Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 545.169

(1) At the district election next following the dividing of the district into divisions, the office of the director whose term expires the following January shall be filled by election of a director from the newly created division which is without representation on the board.

(2) If there are two divisions without representation, then a director shall be elected at the district election next following the division of the district from the newly created division without representation on the board that contains the largest number of electors. The other newly created division shall elect a director at the second general election following the division, which director shall take office at the expiration of the term of the second retiring member of the board.