Treaties — Interpretation — Principles and rules of interpretation — Treaty silent on matter in dispute — Inferences to be drawn from absence of specific provisions — General principles of the treaty — Constructive approach to interpretation — Air Services Agreement of 27 March 1946 between United States and France — Alleged breach of treaty affecting United States national — Dispute over interpretation of treaty referred to arbitration — Whether local remedies rule applicable — Reprisals — Legality of counter-measures as a response to breach of treaty — Arbitration — Suitability of question for consideration by Tribunal