Parties to an arbitration agreement sometimes choose to include a delegation clause, which is a provision that delegates to the arbitrator—rather than a court—gateway questions of arbitrability, such as whether the agreement covers a particular controversy or whether the arbitration provision is enforceable at all. See Caremark LLC v. Chickasaw Nation.

In Holley-Gallegly v. TA Operating, LLC, the Ninth Circuit recently reinforced the Supreme Court’s decade-old distinction between the analysis needed to determine whether a dispute is subject to arbitration on the one hand, and whether an arbitrator has been legally delegated the authority to make that threshold determination on the other. The decision provides important lessons to practitioners litigating disputes regarding the enforceability of delegation clauses.