Lalive, J.-F. Keywords: International organizations | Sovereign immunities | Mots clefs: Organisations internationales | Immunités judiciaires | ABSTRACT Jean-Flavien Lalive points out that an extremely vast subject of the jurisdictional immunity of States is both annoying and fascinating. It is annoying because it has been a source of considerable confusion and misunderstanding on the part of the domestic courts. But it is fascinating for the lawyer because it makes him discover a situation in a completed course…