State responsibility — Nature and kinds of — For taking of, or interference with, property — Algeria — Declaration that foreign property bona vacantia — Administration by the State — Whether amounting to nationalization — Whether contrary to French ordre public — Whether taking over assets of an undertaking necessarily entails liability for debts incurred previously — Whether original debt of undertaking extinguished — Sureties — Whether they remain liable for debts of a nationalized undertaking — The law to be applied — The law of France.