The arbitral tribunal shall be composed of one or more arbitrators in an odd number.
It shall be supplemented if the arbitration agreement provides for the appointment of an even number of arbitrators.
If the parties do not agree on the appointment of an additional arbitrator, the arbitral tribunal shall be completed within one month of the acceptance of their appointment by the arbitrators chosen or, failing that, by the supporting judge referred to in Article 1459.
The arbitral tribunal shall be composed of one or more arbitrators in an even number.