ORS § 547.215
Upon adoption of the plan for reclamation, the county judge shall, by order, appoint three commissioners (who shall not be landowners in the district nor of kin within the fourth degree of consanguinity to any person owning land in the district), one of whom shall be a civil engineer and two of whom shall be freeholders residing within the state. A majority of the commissioners shall constitute a quorum and shall control the action of the board on all questions. Such commissioners shall constitute a body which shall continue in office and may be convened at any time by the county court for the purpose of correcting any errors, omissions or other mistakes that shall have been discovered in its original report as the same may have been amended and supplemented from time to time or for any other good cause shown. The court shall fill any vacancy occurring in such body of commissioners by appointment of a person who has the qualifications required by this section of the commissioner the person is to replace. Whenever said body of commissioners has been reconvened by the court, it shall thereafter make its report in response to the directions of the court and such report when completed shall be subject to ORS 547.245, with reference to a hearing thereon and a confirmation thereof by order or judgment of the court before such supplemental report shall go into effect.
ORS 547.215