Oregon Revised Statutes State Legislative Department and Laws § 171.060

(1) When any vacancy as is mentioned in ORS 171.051 exists in the office of Senator or Representative affiliated with a major political party and that vacancy is to be filled by an appointing authority as provided in ORS 171.051, the Secretary of State forthwith shall notify the person designated by the party to receive such notice. The party shall pursuant to party rule nominate not fewer than three nor more than five qualified persons to fill the vacancy. The nominating procedure shall reflect the principle of one-person, one-vote to accord voting weight in proportion to the number of party members represented. At the request of a party making a nomination, the county clerks of each county constituting the district in which the vacancy exists shall assist the party in determining the number of electors registered as members of the party in the district. A person shall not be nominated to fill the vacancy unless the person signs a written statement indicating that the person is willing to serve in the office of Senator or Representative. As soon as the nominees have been appointed, but no later than 20 days after the vacancy occurs, the party shall notify the Secretary of State of the persons nominated. The notification shall be accompanied by the signed written statement of each nominee indicating that the nominee is willing to serve in the office of Senator or Representative. The Secretary of State shall notify the county courts or boards of county commissioners of the counties constituting the district in which the vacancy exists of the nominees and of the number of votes apportioned to each member of the county courts or boards of county commissioners under ORS 171.062 and 171.064. The Secretary of State shall set a time for the meeting of the county courts or boards of county commissioners in order to fill the vacancy and by rule shall establish procedures for the conduct of the meeting. If the district is composed of more than one county, the Secretary of State shall name a temporary chairperson and designate a meeting place within the district where the county courts or boards of county commissioners shall convene for the purpose of filling the vacancy, pursuant to ORS 171.051 (2).

(2) When any vacancy as is mentioned in ORS 171.051 exists in the office of Senator or Representative not affiliated with a major political party and that vacancy is to be filled by an appointing authority as provided in ORS 171.051, the Secretary of State forthwith shall notify the county courts or boards of county commissioners of the counties constituting the district in which the vacancy occurs of the vacancy and of the number of votes apportioned to each member of the county courts or boards of county commissioners under ORS 171.062 and 171.064. The Secretary of State shall set a time for a meeting of the county courts or boards of county commissioners and by rule shall establish procedures for the conduct of the meeting. If the district is composed of more than one county, the Secretary of State shall name a temporary chairperson and designate a meeting place within the district where the county courts or boards of county commissioners shall convene for the purpose of appointing a person to fill the vacancy.

(3) A written statement signed by a majority of those qualified to vote upon the filling of any vacancy naming the person selected to fill the vacancy and directed to the Secretary of State is conclusive evidence of the filling of the vacancy by the appointing authority named therein.