Oregon Revised Statutes Public Officers and Employees § 243.698

(1) When the employer is obligated to bargain over employment relations during the term of a collective bargaining agreement and the exclusive representative demands to bargain, the bargaining may not, without the consent of both parties and provided the parties have negotiated in good faith, continue past 90 calendar days after the date the notification specified in subsection (2) of this section is received.

(2) The employer shall notify the exclusive representative in writing of anticipated changes that impose a duty to bargain.

(3) Within 14 calendar days after the employer's notification of anticipated changes specified in subsection (2) of this section is sent, the exclusive representative may file a demand to bargain. If a demand to bargain is not filed within 14 days of the notice, the exclusive representative waives its right to bargain over the change or the impact of the change identified in the notice.

(4) The expedited bargaining process shall cease 90 calendar days after the written notice described in subsection (2) of this section is sent, and the employer may implement the proposed changes without further obligations to bargain. At any time during the 90-day period, the parties jointly may agree to mediation, but that mediation shall not continue past the 90-day period from the date the notification specified in subsection (2) of this section is sent. Neither party may seek binding arbitration during the 90-day period.