Oregon Revised Statutes Counties and County Officers § 202.070

(1) If the election was for the purpose of establishing a new county, it thereafter shall be a county for all civil, military and other purposes.

(2) If the election was for the purpose of changing county boundaries, the boundaries of the county shall be changed to conform to the description furnished by the county clerk in the certificate provided in ORS 202.050. If such change in county boundaries resulted in the elimination of any existing county, thereafter the eliminated county shall cease to function and the authority of its officers shall cease for all purposes other than the auditing and paying of all outstanding claims against such county and the safekeeping of all county property until proper transfers and assignments of the same have been made.

(3) If the election was for the purpose of changing county boundaries, the change shall take effect within 30 days after the Governor issues the proclamation provided for in ORS 202.060 and the territory taken from any county and added to another county by reason of the change shall become a part of the county to which it has been added and for all purposes shall be deemed a portion thereof and be governed by the laws of this state relating to counties.