(a) The mandate of an arbitrator terminates on any of the following grounds:
(1) The arbitrator becomes unable to perform the arbitrator's functions or for other reasons fails to act without undue delay.
(2) The arbitrator withdraws.
(3) The parties agree to the termination.
(b) If a controversy remains concerning any of the grounds referred to in subsection (a) of this section, a party may request the court to decide on the termination of the mandate. The decision of the court is final and not subject to appeal.
(c) If an arbitrator withdraws or otherwise agrees to the termination of the arbitrator's mandate, no acceptance of the validity of any ground referred to in this section is implied in consequence of the action.