By Julio-César Betancourt, University of Salamanca and International Arbitration Law Clerk at 20 Essex Street
In international commercial arbitration, issues relating to the unconstitutionality of national law (or national legislation) are very rarely raised before the arbitral tribunal. Within a purely academic setting, Jan Paulsson once commented that “[t]here [was] nothing at all unorthodox about the proposition that international tribunals empowered to apply national law [are also entitled to] make plenary determinations about [its] constitutionality.” (J PAULSSON, International Arbitration Is Not Arbitration, (2008) 2 Stockholm International Arbitration Review 18.)
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