Since the passing of Commercial Arbitration Acts (CCA’s) in all States of Australia,[1] arbitration is becoming an increasingly popular method of dispute resolution. However, because arbitrations are usually conducted privately, valuable data on arbitrations, and their subject matter, is limited. The High Court recently provided insight into the scope of arbitrations, in the decision of Rinehart v Hancock Prospecting Pty Ltd [2019] HCA 13, where it determined that the validity of an arbitration agreement was fit for determination by arbitration.