The IATTC was established by a convention signed in 1949 between the Republic of Costa Rica and the United States of America as the initial contracting parties.
IATTC tika izveidota ar 1949. gada starp Kostarikas Republiku un Amerikas Savienotajām Valstīm kā līgumslēdzējpusēm noslēgto konvenciju.