The U.S. Supreme Court will review whether an arbitrator exceeded his powers by inferring an agreement to arbitrate class claims from contract language that made no mention of such claims.

The justices granted certiorari on Dec. 7 in Oxford Health Plans v. Sutter, No. 12-135, two years after ruling that arbitrators cannot force a party to arbitrate on a class basis without a contractual basis for concluding that the party agreed to do so.