‹ 17. Death of a party 18. Number of arbitrators › Chapter 3 — Composition of arbitral tribunal 18. Number of arbitrators 19. Appointment of arbitrators 20. Grounds for challenge 21. Challenge procedure 22. Failure or impossibility to act 23. Appointment of substitute arbitrator 24. Liability of arbitral tribunal and others ‹ 17. Death of a party 18. Number of arbitrators ›