Agreement between the Government of the United Kingdom of Great Britain and Northern Ireland and the Austrian Government for the Repayment of Credits granted to the Government of the United Kingdom by the European Payments Union and by the Austrian Government to the Union in accordance with the provisions of the Agreement of the 19th of September, 1950 for the Establishment of the European Payments Union [With Exchanges of Letters of July 9 and July 28/30, 1954]