Nicaragua signed the Treaty of Tlatelolco on February 15, 1967, ratified the Treaty on October 24, 1968 and on that same date presented its declaration of waiver of the requirements indicated in Article 29, paragraph 2, of the Treaty of Tlatelolco.
Nicaragua signed a Nuclear Safeguards Agreement with the International Atomic Energy Agency (IAEA) on February 28, 1975, in accordance with Article 13 of the Treaty of Tlatelolco.
Nicaragua signed the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) in London and Washington on July 1, 1968 and ratified it on March 6, 1973 in Washington.
Nicaragua signed the Comprehensive Nuclear Test Ban Treaty (CTBT) on September 24, 1996 and ratified it on December 5, 2000.
Nicaragua signed the Treaty on the Prohibition of Nuclear Weapons (TPAN) on September 22, 2017 and ratified it on July 19, 2018.