State responsibility — Nature and kinds of — For other breaches of contractual obligations — Contractual claim against Iranian joint — stock company — Whether National Iranian Oil Company legal successor — Iran — United States Claims Settlement Declaration, 1981 — The law and practice of the Iran — United States Claims Tribunal

Disputes — Arbitration — Procedure — Competence — Competence to determine jurisdiction — Contract between Iranian company and claimant — Claimant also bringing action against Islamic Republic of Iran and National Iranian Oil Company — Whether claim within the jurisdiction of the Tribunal — Iran-United States Claims Settlement Declaration, 1981 — Whether contracting company agent of NIOC — Whether controlled by NIOC — Whether NIOC successor to contracting company — The law and practice of the Iran — United States Claims Tribunal