From the perspective of users of international commercial arbitration, the uncertainties surrounding the application of good faith by an arbitral tribunal create an unwelcome unpredictability. Acknowledging this prevalent situation, this book is the first to study in depth the available international arbitral awards that have applied good faith, thus providing detailed guidance on how this notion is (and can be) applied by tribunals in international commercial arbitration. Moreover, the author proposes a set of deeply informed guidelines for the future application of good faith by arbitral tribunals to both the parties' contract and the arbitration agreement. This book provides a comprehensive description of the role and scope of good faith under governing laws in key jurisdictions (England, New York, Switzerland, France, Germany, China, Singapore, Hong Kong, Australia, and Canada) as well as under the CISG, the UNIDROIT Principles, and other uniform law and soft law instruments.