Part I. Introduction: 1. Legal uncertainty and indeterminacy - immutable characteristics of the OSCE? Carolyn Moser and Anne Peters; Part II. The Quest for International Legal Personality: 2. Political dynamics and institutional reforms in the OSCE Christian Nünlist and Petri Hakkarainen; 3. The role of the organisation in asserting legal personality: the position of the OSCE secretariat on the OSCE legal status Lisa Tabassi; 4. Legal personality of the OSCE - past developments, status quo and future ambitions Helmut Tichy; 5. 'It's politics, stupid': an international relations perspective on strengthening the legal framework of the OSCE Tanja A. Börzel and Ingo Peters; 6. Domestic implications of the OSCE's legal personality under Russian constitutional law Gleb Bogush; Part III. Manifestations of the Legal Position under International Law: 7. Revisiting questions of organisationhood, legal personality and membership in the OSCE: the interplay between law, politics and practice Niels M. Blokker and Ramses A. Wessel; 8. The OSCE's domestic legal status: an exploration of relevant international law sources Cedric Ryngaert; 9. Privileges and immunities of the organization for security and co-operation in Europe (OSCE) Isabelle Pingel; 10. The external relations of the OSCE Laurence Boisson de Chazournes and Andrzej Gadkowski; 11. The international responsibility of the OSCE Lorenzo Gasbarri; Part IV. The Legal and Institutional Framework as a Governance Issue: 12. The OSCE as a case of informal international lawmaking? Olivia Herman and Jan Wouters: 13. Conceptualising accountability in the legal and institutional framework of the OSCE Carolyn Moser; 14. Legitimate governance as a privilege and price for the autonomy of international organisations Mateja Steinbrück Platise; Part V. Conclusions: 15. Transformation of the OSCE legal status Mateja Steinbrück Platise and Anne Peters.