599. The arbitral tribunal.

599.     The arbitral tribunal.

As soon as possible after registration of a request for arbitration, an arbitral tribunal must be constituted1, consisting of a sole arbitrator or any uneven number of arbitrators as the parties agree2 or, in default of agreement, three arbitrators, one appointed by each party and the third, who functions as president of the tribunal, appointed by agreement of the parties3. If, however, the tribunal has not been constituted within 90 days after the dispatch of notice of registration of the request4, or such other period as the parties may agree, the chairman5, at