Supplementary Agreement Amending the Agreement on Social Security between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland message from the President of the United States transmitting a Supplementary Agreement Amending the Agreement between the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland on Social Security (the Supplementary Agreement), which consists of two separate instruments : a principal agreement and an administrative arrangement; the supplementary agreement, signed at London on June 6, 1996, is intended to modify certain provisions of the original United States-United Kingdom Social Security Agreement, signed at London February 13, 1984, pursuant to 42 U.S.C. 433(e)(1).