In 1947, the Northern Mariana Islands became part of the post-World War II United Nations Trust Territory of the Pacific Islands (TTPI). The United States became the TTPI’s administering authority under the terms of a trusteeship agreement. In 1976, Congress approved the mutually negotiated Covenant to Establish a Commonwealth of the Northern Mariana Islands (CNMI) in Political Union with the United States. The CNMI Government adopted its own constitution in 1977, and the constitutional government took office in January 1978. The Covenant was fully implemented November 3, 1986, pursuant to Presidential Proclamation no. 5564, which conferred United States citizenship on legally qualified CNMI residents.
On December 22, 1990, the Security Council of the United Nations terminated the TTPI as it applied to the CNMI and five other of the TTPI’s original seven districts (the Marshall Islands and the Federated States of Micronesia (Chuuk, Kosrae, Pohnpei and Yap)).
