Question juridique clé
Whether the arbitrator had to be recused because he represented the appellant's opponent in another dispute
Solution extraite
Yes. Acting as counsel for the opposing party in another pending case made the arbitrator appear incapable of participating as chair of the arbitral tribunal.
Motifs extraits
The Federal Supreme Court referred to its earlier judgment in the same matter and held that the parallel mandate created an appearance of bias in the new arbitration as well.