International Claims Settlement Act Amendments of 1983 - Amends the International Claims Settlement Act of 1949 to permit the Foreign Claims Settlement Commission to determine the claims against East Germany of persons who were aliens lawfully admitted for permanent residence in the United States as of the date of their property loss and who were citizens of the United States by September 4, 1974 (currently only persons who were U.S. nationals as of the date of the loss may receive such a determination).