Sufficiency of resolution; copy as evidence. (1) In any suit, action or proceeding involving the validity or enforcement of or relating to any contract of authority, the authority is conclusively deemed to have become established and authorized to transact business and exercise its powers upon proof of the adoption of a resolution by the governing body declaring the need for the authority. The resolution is deemed sufficient if it declares that there is a need for an authority and finds that the condition described in ORS 456.085 exists in the city or county, in substantially the terms used in that subsection, no further detail being necessary

ORS 456.090 — under Chapter 456.