Oregon Revised Statutes Public Facilities, Contracting and Insurance § 279A.128

(2)(a) Notwithstanding provisions of law requiring a contracting agency to award a contract to the lowest responsible bidder or best proposer or provider of a quotation, a contracting agency that uses public funds to procure goods or services for a public use under ORS chapter 279B may give preference to procuring goods that are fabricated or processed, or services that are performed, entirely within this state if the goods or services cost not more than 10 percent more than goods that are not fabricated or processed, or services that are not performed, entirely within this state. If more than one bidder or proposer qualifies for the preference described in this subsection, the contracting agency may give a further preference to a qualifying bidder or proposer that resides in or is headquartered in this state.

(b) The contracting agency by order may set a higher percentage than the percentage set forth in paragraph (a) of this subsection if the contracting agency, in a written determination to support the order, finds good cause to set the higher percentage and explains the contracting agency's reasons and evidence for the finding.