ORS 198.725: Procedure when two counties affected.

If there are two or more affected counties in a proceeding under ORS 198.705 to 198.955, any notices, proceedings, orders or any other act authorized or required to be given, taken or made by the county board, the county clerk or any other officer of a county, shall be given, taken or made by the persons holding such offices in the principal county. Officers of an affected county other than the principal county shall cooperate with the officers of the principal county and shall furnish the officers of the principal county with such certificates, records or certified copies of records as may be necessary to enable the officers of the principal county to comply with ORS 198.705 to 198.955.