Treaties — Operation of — Binding Force of Unilateral Governmental Interpretation — Most-Favoured-Nation Clause — Anglo-French Treaty of February 28, 1882 — Memorandum Addressed on July 22, 1929, to the Minister of Justice by the French Minister for Foreign Affairs Interpreting Article 1 of that Treaty — Effect of Bilateral Governmental Interpretation — Anglo-French Exchange of Notes of May 21–25, 1929.