States as international persons — State succession — Succession with regard to contractual and other obligations and concessions — Claim by participant in wartime coal management group organized by French authorities in Algeria for payment of allowances — Algerian accession to independence — Declaration of Principles concerning Economic and Financial Co — operation 1962, Article 18 — Judicial Protocol 1962, Article 17 — Interpretation — Whether action originally brought against French authorities in Algeria within jurisdiction of French courts — Whether France or Algeria responsible for payment — Obligations within areas of competence transferred by France to Algeria — Whether the responsibility of France where its general interests were involved in the conclusion of the obligation — The law of France