Excess of Powers in International Commercial Arbitration

Excess of Powers in International Commercial Arbitration
  • Compliance with the Arbitral Tribunal’s Mandate in a Comparative Perspective
  • Author(s): Piotr Wiliński
  • ISBN Book: 978-94-6236-991-7, #1 edition
  • ISBN E-Book: 978-94-6094-512-0, #1 edition
  • Year of publication: 2021
  • Product specifications


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Although the idea of arbitral tribunal’s mandate is in everyday use in the international arbitration scholarship, it remains an elusive concept lacking any legal definition. Often associated with other notions such as the tribunal’s mission, powers, authority or even jurisdiction, the meaning of arbitral tribunal’s mandate remains a moving target and escapes easy classification.

Yet, perhaps somewhat surprisingly, a non-compliance with the arbitral tribunal’s mandate provides a basis for a challenge of the arbitral award at the post-award stage (either during setting aside proceedings or at the enforcement stage). Since the concept of the tribunal’s mandate is vague, it attracts, in turn, a broad interpretation of the ground leading to a frustration of the fundamental value of arbitration – the finality of the arbitral award.

It is therefore essential to determine how the national courts review arbitral awards on the basis of ‘excess of mandate’ and consequently in what instances  they accept the argument that the tribunal acted in violation of its mandate. This study aims at recognizing the similarities and differences of the ‘excess of mandate’ type of challenges in selected legal systems (namely  the UNCITRAL Model Law, France, England, the U.S. and the New York Convention).

Looking through the eyes of what the selected legal systems consider to be an ‘excess of mandate’ allows to identify common features and contributes to a better understanding of the concept of the arbitral tribunal’s mandate by arbitrators, judges and legal practitioners alike. Accordingly, this research adds a building block to the definition of the tribunal’s mandate.

Information about the author(s)

Piotr Wiliński is an Assistant Professor at the Erasmus University, Rotterdam where he teaches international commercial and investment arbitration and acts as an Academic Coordinator of International Arbitration and Business Law variation of Commercial Law LLM. His research  focuses on powers of the arbitral tribunals. Besides academia, Dr.  Wiliński is working in a Litigation and Arbitration practice group of a major Dutch law firm.

Product specifications

Author(s) Piotr Wiliński
ISBN Book 978-94-6236-991-7,#1 edition
ISBN E-Book 978-94-6094-512-0,#1 edition
Publication date 19 december 2019
Number of pages 558 Pages
Brand Eleven
Subject(s) Business and Commercial Law, International law
Language English

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