Arbitration — Successive arbitrations — Status of second arbitration tribunal — Second tribunal's jurisdiction confined to matters within the jurisdiction of the first tribunal — Whether second tribunal possessing independent status — Effect of award of second tribunal — Res judicata

Arbitration — Evidence — Maps — Reliability — Different uses which parties to arbitration made of maps — Other evidence before tribunal — Estoppel — Acquiescence

Arbitration — Procedure — Closing submissions of parties — Whether parties able to modify submissions — Use of expert by tribunal — Whether tribunal delegating power to expert — Finality of award — Party seeking revision of award on grounds of error — Powers of tribunal — Distinction between errors of fact and errors of law

International tribunals — Arbitration tribunal established by two States to determine boundary — Status — Procedure — Evidence

Lakes and landlocked seas — Lakes — Lake as part of international boundary — Water-parting — Use as boundary — Distinction between continental water-parting and local water-parting

Territory — Boundaries — Principles of delimitation — Use of orographical and hydrographical techniques — Maps — Relevance — Importance in showing State practice — Water-parting as boundary — Whether boundary could cross glacier — Effect of movement of glacier — Estoppel — Acquiescence — Administrative acts in disputed territory — Interpretation of earlier arbitration award — Effect of changed knowledge of location of water-parting since original award delivered — Argentine — Chile boundary