Oregon Revised Statutes Counties and County Officers § 202.040

(1) In case the petition provided for in ORS 202.020 is for a change in the boundaries of existing counties, but not for the elimination of any then existing county, the county courts of the counties concerned shall appoint two commissioners each to act with the commissioners of the other counties and arrange the terms in respect to assumption of liabilities and division of assets among the counties concerned, upon which such change shall be made.

(2) If within 30 days after the appointment of the commissioners they have not agreed upon terms, the Governor, upon request of the county court of any county concerned, shall appoint commissioners equal in number to one-half the commissioners already appointed by the counties, who shall meet with such commissioners and draft terms.

(3) Within 60 days thereafter a majority of the commissioners may report to respective county courts a plan for division, which, in addition to the matters mentioned in subsection (1) of this section, may define the territory embraced in the proposed changes.

(4) When made within such time the plan shall be reported by the commissioners to the respective county courts, and if approved by a vote, as provided in ORS 202.030 and 202.060, it shall become a compact between and among such counties, binding upon all.