Oregon Revised Statutes Remedies and Special Actions and Proceedings § 36.480

(1) If an arbitrator withdraws from the case or if the parties agree on termination because the arbitrator becomes unable, de facto or de jure, to perform the functions of the arbitrator or for other reasons fails to act without undue delay, then the arbitrator's mandate terminates.

(2) If a controversy remains concerning any of the grounds referred to in subsection (1) of this section, a party may request the circuit court to decide on the termination of the mandate.

(3) The decision of the circuit court under subsection (2) of this section is not subject to appeal.

(4) If, under this section or ORS 36.478 (3), an arbitrator withdraws from office or a party agrees to the termination of the mandate of an arbitrator, this does not imply acceptance of the validity of any ground referred to under this section or under ORS 36.476 (4) and (5).