The Federal Tribunal refers to two arbitrations. As it happens, I was one of the arbitrators in one of the two and it might not be fully appropriate for me to comment or criticize the decision.
Accordingly, I will simply point out the issues the Federal Tribunal dealt with:
(i) Section 3 of the opinion deals with jurisdiction. The interesting part is at 22.214.171.124 at pages 10 – 11.