Arbitration — Challenge to validity of Award — Application to declare invalid or set aside — Claim that one arbitrator excluded from deliberations — Claim of res judicata — Excess of mandate — Whether Award ought to be set aside

Jurisdiction — Parallel treaty proceedings — Whether res judicata arises — Where objection to res judicata waived — Whether objection to abuse of process sufficient

Applicable law — Choice of law clause — Where one source of law applied — Whether Tribunal exceeded mandate

Procedure — Deliberations — Whether arbitrator excluded — Whether obligation to continue deliberations when two arbitrators are in agreement