Oregon Revised Statutes Education and Culture § 335.525

In an election to add districts to a union high school district, if the district boundary board determines that the proposition carried in the union high school district by a majority of votes cast, and also carried in one or more of the common school districts by a majority of the votes cast in each district, it shall declare the proposition carried as to those common school districts only in which the proposition prevailed, and shall immediately proceed to change the boundaries of the union high school district to include those districts desiring to be added thereto.