State responsibility — Interest — The dies a quo — The dies ad quem — Date from which interest payable — Iran — United States Claims Settlement Declaration, 1981 — The law and practice of the Iran — United States Claims Tribunal

Disputes — Arbitration — The award — Scope and binding force of the award — Interest — Rate of interest — Date from which interest payable — Damages — Whether interest should be awarded as part of damages — The nature of the arbitral function — Refusal of arbitrator to sign award — Procedure amongst the arbitrators — Allegations of delay — Propriety of arbitrator delivering opinion stating reasons for refusing to sign award — Disclosure of details of discussions amongst arbitrators — Duty of confidentiality — The law and practice of the Iran-United States Claims Tribunal