Are the International Institute for the Unification of Private Law (UNIDROIT) Principles of International Commercial Contracts just a restatement-like collection of principles and rules or a system of transnational contract law? Two recent arbitral awards support the latter view. In both cases, the tribunals decided complex international business disputes solely on the basis of the 2016 edition of the UNIDROIT Principles. In both cases, the tribunals used the UNIDROIT Principles as a self-sufficient, comprehensive, transnational legal system which enabled them to resolve all legal issues of the complex disputes before them to the exclusion of any domestic law.