Conocophillips Arbitration update, page-92

Thanks Whisky. It seems that it only takes a maximum of 60 days to get your panel of arbitrators. 30 days for the initial 2 (or they get court appointed) and then 30 for the 3Rd arbitrator or the court decides.

Here is the excerpt for the third:
5)
Where the dispute is to be referred to three arbitrators, the third arbitrator, who will act as president of the arbitral tribunal, shall be appointed by the Court, unless the parties have agreed upon another procedure for such appointment, in which case the nomination will be subject to confirmation pursuant to Article 13. Should such procedure not result in a nomination within 30 days from the confirmation or appointment of the co-arbitrators or any other time limit agreed by the parties or fixed by the Court, the third arbitrator shall be appointed by the Court

This seems to suggest it should be constituted unless a settlement gets made in the meantime or a time extension is agreed.