Or. Rev. Stat. § 2.100
Subject to ORS 2.111, the presence of a majority of all the judges of the Supreme Court is necessary for the transaction of any business, except that less than a majority of the judges may meet and adjourn from day to day, or for the term, with the same effect as if all the judges were present.
[Amended by 1959 c.44 §6; 2003 c.14 §4]