Arbitration Tribunal in the Government of Sudan v. Sudan People’s Liberation Movement/Army (Abyei Arbitration). Members of the Tribunal. Standing from left to right: Professor Gerhard Hafner, Professor Pierre-Marie Dupuy, Judge Stephen Schwebel. Seated from left to right: H.E. Judge Awn Al-Khasawneh, Professor W. Michael Reisman, Peace Palace, The Hague (2009).