The right of the United States to use of the islands remained until April 25, 1971, when the lease was officially terminated by the denunciation of the Bryan-Chamorro Treaty on July 14, 1970, under the presidency of Anastasio Somoza Debayle.
Pravo SAD-a da koriste otoka ostao je do 25. travnja 1971. godine, kada je zakup i službeno završen raskidom Ugovora Bryan-Chamorro 14. srpnja 1970., za vrijeme predsjednika Anastasia Somoza Debayle.