ORS § 450.785
In addition to other methods of initiating proceedings for the formation of a sanitary authority under ORS 450.705 to 450.860 and 450.865 to 450.945 and when they consider it necessary for the protection of the public health, safety and welfare, the governing bodies of one or more counties may on their own motion initiate the formation of a sanitary authority by order in the manner provided in ORS 198.835. However, a district proposed to be initiated under this section need not be located entirely within one county. If the governing body of more than one county initiates formation of a sanitary authority under this section, the governing body of the principal county, as that term is defined in ORS 198.705, shall set the date, time and place of the public hearing, give notice of the hearing, conduct the hearing and call the election as provided in ORS 198.800 to 198.825.
ORS 450.785