ORS § 545.207
Upon an increase of the number of directors from three to five, the board shall divide the total acreage of the district that is subject to assessment or charges by the district, into five divisions. Each division shall be as nearly equal in total acreage as may be practicable. In addition, the board shall define and particularly describe division boundaries and make use, in so far as may be desirable, of such natural boundaries as may exist in the district. The divisions shall be numbered first, second, third, fourth and fifth. As the terms of the present members of the board of directors expire, one director who is a resident of Oregon and either a bona fide owner of land or a shareholder of a bona fide corporate owner of land situated in the division, shall be elected from each division as the representative of that division on the board of directors. Voting for director of each division shall be by qualified electors within the division. However, the qualified electors of any district may, by a majority vote, determine that voting for directors shall be by the qualified electors of the entire district. If an elector is an owner in two or more divisions and resides in one of them, the elector shall vote in the division of residence. If an elector is a nonresident of the district, the elector may choose to vote in any one division in which the elector is an owner of land. When a nonresident landowner chooses to vote in any one division, the landowner shall file with the secretary of the board a notice of the choice of division where the nonresident landowner chooses to vote. A nonresident landowner's choice to vote in a certain division is permanent and remains permanent until the nonresident landowner's ownership status changes in any way or until the nonresident landowner becomes a resident owner.
ORS 545.207