The Nauru Island Agreement was a joint trusteeship document between the governments of the United Kingdom, Australia, and New Zealand regarding administration of the Pacific island of Nauru.
[2] Due to the League of Nations mandate placing Australia, the United Kingdom and New Zealand in control of Nauru, it was necessary to construct an agreement on how the island was to be administered.
[1] The act also required that a Board of Commissioners was to be formed comprising one member from each nation that was part of the agreement.
[1] The Board of Commissioners was given title to the phosphate deposits on the island, and any "land, buildings, plant, and equipment on the island used in connexion with the working of the deposits"; however remuneration was to be given to the previous owners.
[1] The act prohibited the supply of phosphate from Nauru to any country except Australia, New Zealand and the United Kingdom unless the entire Board of Commissioners agreed to the sale.