State Succession — Succession with Regard to Contractual Obligations — Debts of Wartime Puppet State — Debts of Independent State of Croatia — Refusal by Yugoslavia to Pay.

State Responsibility — For Debts — Debts of Wartime Puppet State — Debts of Independent State of Croatia.

Arbitration — Appointment of Arbitrators — Appointment of Arbitrator by Third Party in Default of Appointment by Respondent — Arbitration under Universal Postal Convention of Paris, 1947.

Arbitration — Procedure — Competence of Arbitral Tribunal — Competence to Determine Jurisdiction — Arbitration under Universal Postal Convention of Paris, 1947.

Belligerent Occupation — Administrative Functions of Occupant-Postal Administration of Occupant — Clearing of Debts of

International Organization — Organs of International Administration — Universal Postal Convention of Brussels, 1952 — Payment between Postal Administrations — Payment for Reply Coupons Issued in Wartime Puppet State — The Independent State of Croatia — Payment of Transit Charges from Enemy Occupied Territory — German Occupation of Yugoslavia — Arbitrability of Dispute — Absence of Uncontested Relevant Rule of International Law — Arbitration — Appointment of Arbitrators — Appointment of Arbitrator by Third Party in Default of Appointment by Respondent — Arbitration under Universal Postal Convention of Paris, 1947 — Belligerent Occupation — Administrative Functions of Occupant — Postal Administration of Occupant — Clearing of Debts of — State Succession — Succession with Regard to Contractual Obligations — Debts of Wartime Puppet State — Debts of Independent State of Croatia — Refusal by Yugoslavia to Pay.