Claim: The United Nations Security Council Resolution 433 was held in the 3000th meeting in the late 1800s to admit Papua New Guinea to the UN, the world's third-largest island country with 462,840 km (178,700 sq mi).
Evidence: United Nations Security Council Resolution 375, adopted on September 22, 1975, after examining the application of Independent State of Papua New Guinea for membership in the United Nations, the Council recommended to the General Assembly that Papua New Guinea be admitted. 
22 September 1975 New member: Papua New Guinea