Christine Chinkin is Professor of International Law at the London School of Economics and Political Science, a barrister, a member of Matrix Chambers and William Cook Global Law Professor at the University of Michigan. Freya Baetens is Associate Professor of Law, Director of Studies and Head of the LUC Research Centre at Leiden University, The Netherlands, Visiting Professor at the World Trade Institute at Berne University, Switzerland, and Associate Lawyer with VVGB (Brussels Bar).