1. If the mandate of an arbitrator expires due to challenge, dismissal, withdrawal, or any other reason, a substitute shall be appointed according to the procedures followed in the appointment of the arbitrator whose mandate has expired. 2. The parties may, after appointment of a substitute arbitrator, agree to maintain any of the procedures previously taken and determine the scope of the same. If the parties fail to reach an agreement in this regard, the Arbitral Tribunal which is re-formed shall decide whether any of the previous procedures is considered valid and the scope of the same. Any decision issued by the re-formed Arbitral Tribunal shall not affect the right of any of the parties to challenge the procedures taken prior to the formation of the Arbitral Tribunal based on any reason arising prior to the appointment of the substitute arbitrator.
Interpretation and application must be checked against the official text and current version.