Oregon Revised Statutes Education and Culture § 342.910

(1) Any teacher who files an appeal of a dismissal or nonextension of a contract decision with the Fair Dismissal Appeals Board, upon motion of the school district, shall be required to waive any contract grievance claim regarding the same dismissal or nonextension of a contract as a condition to Fair Dismissal Appeals Board or subsequent judicial review.

(2) A school district and an exclusive bargaining representative of teachers may agree to waive all or any part of the rights and procedures provided under ORS 342.805 to 342.937 if third party review of any dismissal or nonextension of a contract teacher is available.