Oregon Revised Statutes Miscellaneous Matters Related to Government and Public Affairs § 195.215

(1) The governing body of the city or district shall determine the results of the election from the official figures returned by the county clerk. If the governing body of the city finds that a majority of the votes cast in the territory and a majority of the votes cast in the city favor the annexation plan, the governing body, by resolution or ordinance, shall declare the adoption of the annexation plan. The governing body of the district shall certify the results of the election to the appropriate county governing body. When a majority of the votes cast in the territory and a majority of the votes cast in the district favor the annexation plan, the county governing body by order shall so declare. The resolution, ordinance or order declaring approval of the annexation plan must contain a legal description of each territory annexed.

(2) Annexation of particular tracts of territory takes effect in accordance with the provisions of the adopted annexation plan.