Since 1950, this series has constituted the official publication of U.S. treaties. It contains indexes by subject and country. Publication lags behind ratification by ten years or more. They are retained in file boxes in numerical order until the bound volumes of UST are received. If a signatory party, including the U.S., registered the treaty with the U.N. Secretariat, the text will eventually appear here.
Publication is extremely slow, and there are many gaps in sequence.
Some volumes are available only on microfiche. Prior to 1949, the texts of U.S. treaties were published in the United States Statutes at Large . Volumes 1-4 in this set include multilateral treaties, arranged chronologically. Volumes 5-13 contain bilateral treaties, arranged alphabetically by country. The final volume is a subject and country name index to the entire set.