d. Within 10 days of notifying the appealing officer's former employing agency or the firefighter's former department, the commission shall provide the parties with a list of available arbitrators.
If within 10 days of receiving the list of available arbitrators, the parties are unable to mutually agree upon the selection of an arbitrator and so notify the commission in writing, the assignment of the arbitrator for the purposes of this section shall be the responsibility of the commission, independent of and without any participation by either of the parties. The commission shall select the arbitrator for assignment by lot.
Should an arbitrator selected by mutual agreement be unable to serve, the parties shall be afforded an opportunity to select a replacement. If the two parties are unable to mutually agree upon the selection of a replacement within a time period prescribed by the commission, the commission shall select the replacement in the manner hereinafter provided.
In any proceeding where an assigned arbitrator is unable to serve or, pursuant to the preceding paragraph, the two parties are unable to mutually agree upon a replacement, the commission shall assign a replacement arbitrator. The assignment shall be the responsibility of the commission, independent of and without any participation by either of the parties. The commission shall select the replacement arbitrator for assignment by lot.