Fedozzi, Prosper Keywords: Public acts | Extraterritorial jurisdiction | Mots clefs: Actes publics | Extraterritorialité des lois | ABSTRACT The problem of the extraterritorial effectiveness of laws is not an exclusive private law problem, but it can arise in all laws. Prosper Fedozzi explains that, whatever category these laws belong to, under the growing impulse of international solidarity, each of them can become susceptible to extension outside the territory. The author focuses on the analysis of this phenomenon. Le problème de l'efficacité extraterritoriale des lois …