A unanimous panel of the Fourth Circuit has held Del Webb Communities, Inc. v. Carlson that the question whether an arbitration agreement authorizes class-wide arbitration is for the courts, not an arbitrator, to decide—unless the agreement clearly and unmistakably delegates that issue to the arbitrator. In so holding, the Fourth Circuit aligned itself with decisions of the Third and Sixth Circuits. As we discuss below, the decision benefits businesses that seek to enforce individual arbitration when the arbitration agreement does not expressly authorize class arbitration: If the important question of the availability of class-wide arbitration was assigned to an arbitrator, meaningful judicial review of that decision would not be available.

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