Oregon Revised Statutes Public Health and Safety § 450.610

(1) Consolidation into a joint water and sanitary authority may be initiated by resolution adopted or approved by two or more authorities or district or city governing bodies. However, of the entities initiating the proceedings for consolidation, at least one must be an authority formed under this chapter while the others may consist of any combination of districts or cities. A resolution adopted or approved under this subsection shall state the names of the affected entities and the name of the successor joint authority.

(2) When proceedings have been initiated as provided in subsection (1) of this section, and the consolidating entities are subject to the jurisdiction of a local government boundary commission, the initiating documents shall be filed with the boundary commission as provided by ORS 199.476.