Unless expressly addressed in the arbitration agreement, availability of collective arbitration is determined by arbitrator.

While courts determine the validity of arbitration agreements, whether the contract forbids collective arbitration does not fall within the limited circumstances under which “courts assume that the parties intended courts, not arbitrators, to decide a particular arbitration-related matter,” because the question involves contract interpretation regarding the “kind of arbitration proceeding the parties agreed to.

Robinson v. J&K Admin. Mgt. Servs., Inc, NO. 3:14-cv-00956-L, 2015 WL 1310213 at *4 (N.D.Tex. March 24, 2015)