Westland Helicopters Ltd v Arab Organization for Industrialization, United Arab Emirates, Kingdom of Saudi Arabia, State of Qatar, Arab Republic of Egypt, and Arab British Helicopter Company, Arbitration, 5 March 1984, 80 ILR 600

The present case concerns the responsibility of international organizations and their member states. The Westland Helicopters arbitration is the first case in which a dispute settlement body had to decide on the possible responsibility of states for the wrongful acts of an international organization. While the Arbitral Tribunal in Westland Helicopters decided to hold the member states responsible alongside the international organization, Swiss courts later reversed this decision. The Westland Helicopters cases thus foreshadowed the debate, including many of the recurrent arguments, on whether and when the corporate veil of an international organization should be pierced.