Oregon Revised Statutes Water Resources: Irrigation, Drainage, Flood Control, Reclamation § 554.520

When a corporation receives an application of one or more landowners either to include the lands of the landowner in or exclude the lands of the landowner from the corporation, the application shall be acted upon at a meeting of the members. If at the meeting the members present approve the application of the landowner by a majority vote, articles of amendment shall be executed by the corporation and filed with the Secretary of State and from the date of such filing the lands described in the amendment, as recited in the amendment, shall either be included or excluded from the corporation.