Supplementary Protocol between the Government of the United Kingdom of Great Britain and Northern Ireland and the Government of the United States of America amending the Convention of the 16th of April, 1945 for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with respect to Taxes on Income as modified by the Supplementary Protocol of the 6th of June, 1946

Treaty Series 018/1955: Cmd 9405