Vacating a $10 million arbitration award resulting from a “collective action” arbitration, the U.S. Court of Appeals for the Seventh Circuit ruled that whether class or collective arbitration is authorized by an arbitration agreement is a threshold question for the district court, not an arbitrator. Herrington v. Waterstone Mortgage Corp., No. 17-3609 (7th Cir. Oct. 22, 2018).