Arbitration — Jurisdiction — Mixed Arbitral Tribunal — Competence to Adjudicate Disputes between Nationals and their State — Article 65 of the Treaty of Lausanne.

Claims — Of Nationals against their own State — Whether Admissible before Arbitral Tribunal — Interpretation of Article 65 of Treaty of Lausanne — Responsibility of States — Liability to Restore Property Situated in Territory no longer under the State’s Sovereignty — Responsibility of State Actually Exercising Authority.