Disputes — Arbitration — Procedure — Competence — Iran–United States Claims Settlement Declaration — Forum selection clause — Contracts containing provisions for settlement of disputes by Iranian courts — Cases arising therefrom outside the jurisdiction of the Iran–United States Claims Tribunal — Interpretation — Choice of law clause in contract — Whether choice of Iranian law bringing contract within forum selection clause — Whether clause providing for settlement of disputes under Iranian arbitration laws within scope of forum selection clause — The law and practice of the Iran–United States Claims Tribunal