Oregon Revised Statutes Cities § 222.150

The city legislative body shall determine the results of the election from the official figures returned by the county clerk. If the city legislative body finds that the majority of all votes cast in the territory favors annexation and the city legislative body has dispensed with submitting the question to the electors of the city, the city legislative body, by resolution or ordinance, shall set the final boundaries of the area to be annexed by a legal description and proclaim the annexation.