Jonas Ebbesson is Professor of Environmental Law, former Dean of Faculty of Law (2012–17), and Director of Stockholm Environmental Law and Policy Centre, at Stockholm University. He was member of the Aarhus Convention Compliance Committee 2005–2021, and its Chair 2011–21. He is a member of the Swedish Academy of Letters, History and Antiquities. Ellen Hey is Professor of Public International Law at Erasmus School of Law of Erasmus University Rotterdam, the Netherlands, Adjunct Professor at the Norwegian Center for the Law of the Sea (NCLOS) at UiT – The Arctic University of Norway and Advisor to the Centre for Environmental Law and Policy (CELP), Columbo University. She was a member of the Aarhus Convention Compliance Committee (2008–2014) and a legal advisor to the government of the Netherlands (1986–1990). Her research interests include international environmental law, law of the sea and international institutional law.