| Argentina |
June 22, 1946 |
Ratification : August 31, 1953 |
September 24, 1953 |
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| Bolivia (Plurinational State of) |
June 22, 1946 |
Ratification : June 11, 1947 |
August 18, 1947 |
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| Brazil |
June 22, 1946 |
Ratification : March 12, 1949 |
May 9, 1949 |
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| Chile |
June 22, 1946 |
Ratification : December 10, 1954 |
January 14, 1955 |
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| Colombia |
June 22, 1946 |
Ratification : November 10, 1971 |
January 4, 1972 |
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| Costa Rica |
June 22, 1946 |
Ratification : November 24, 1950 |
December 20, 1950 |
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| Cuba |
June 22, 1946 |
Ratification : August 16, 1955 |
September 29, 1955 |
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| Dominican Republic |
June 22, 1946 |
Ratification : January 13, 1947 |
April 14, 1947 |
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| Ecuador |
June 22, 1946 |
Ratification : February 1, 1947 |
March 4, 1947 |
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| El Salvador |
June 22, 1946 |
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| Guatemala |
June 22, 1946 |
Ratification : November 30, 1951 |
January 10, 1952 |
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| Haiti |
June 22, 1946 |
Ratification : February 18, 1953 |
August 25, 1953 |
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| Honduras |
June 22, 1946 |
Ratification : June 7, 1947 |
June 27, 1947 |
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| Mexico |
June 22, 1946 |
Ratification : February 27, 1947 |
May 26, 1947 |
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| Nicaragua |
June 22, 1946 |
Ratification : June 9, 1950 |
July 12, 1950 |
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| Panama |
June 22, 1946 |
Ratification : February 14, 1984 |
June 7, 1984 |
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| Paraguay |
June 22, 1946 |
Ratification : August 20, 1949 |
September 12, 1949 |
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| Peru |
June 22, 1946 |
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| United States of America |
June 22, 1946 |
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| Uruguay |
June 22, 1946 |
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| Venezuela (Bolivarian Republic of) |
June 22, 1946 |
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