(a) The Tribunal may make separate awards on different issues at different times.
(b) The award shall be in writing and shall state the date on which it was made, as well as the place of arbitration in accordance with Article 38(a).
(c) The award shall state the reasons on which it is based, unless the parties have agreed that no reasons should be stated and the law applicable to the arbitration does not require the statement of such reasons.
(d) The award shall be signed by the arbitrator or arbitrators. The signature of the award by a majority of the arbitrators, or, in the case of Article 63, second sentence, by the presiding arbitrator, shall be sufficient. Where an arbitrator fails to sign, the award shall state the reason for the absence of the signature.