Dr Tanja Masson-Zwaan is Assistant Professor and Deputy Director of the International Institute of Air and Space Law at Leiden University. She is President Emerita of the International Institute of Space Law (IISL) and a former Vice President of the International Astronautical Federation (IAF). She co-authored ‘Introduction to Space Law’ (5th ed., Kluwer 2025) and chairs the Board of Editors of Kluwer’s journal Air and Space Law. Tanja advises the Dutch Government and other institutions on space law issues and was co-founder of the Hague International Space Resources Governance Working Group. She teaches at universities worldwide and serves on various organisations’ (Advisory) Boards, including Open Lunar Foundation and the Space Sustainability Rating. See https://www.linkedin.com/in/tanjamasson/ and https://www.universiteitleiden.nl/en/staffmembers/tanja-masson-zwaan