Haas, R. Keywords: Ports | Free zones | International regime | Mots clefs: Ports | Zones franches | Régime international | ABSTRACT Robert Haas notes that processing zone regimes are far from being the same everywhere. Administrative institutions are characterized under the same single name and show, with analogies, indisputable differences. A precise definition of processing zones in ports in 1928 is impossible. However, Robert Haas points out, the processing zone can usefully be considered as a fraction of territor…