About United States Treaties in Force
Treaties in Force: A List of Treaties and Other International Agreements of the United States in Force on January 1 [year] provides official status of U.S. treaties in force as of the date on the volume; citations to TIAS and UST; lists of treaties by countries and subjects; indication of reservations, understandings and declarations
TIF is updated only once a year. The Dept. of State issued a 2014 supplement to 2013 instead of a complete new edition. The TIF updating and search tools provide later citations, later status information, lists of later treaties or pending treaties on a topic or with a certain country, etc.