Treaties and other international acts series. 2902. Double taxation, taxes on income, convention and protocol between United States and Greece, convention signed Athens, Feb. 20, 1950, protocol signed Athens, Apr. 20, 1953 convention and protocol proclaimed by President of United States Jan. 15, 1954; entered into force Dec. 30, 1953; operative reoractively Jan. 1, 1953 and protocol of exchange of ratifications, signed Athens Dec 30, 1953.