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Index/Topics/Federal Records and Certification

Federal Records and Certification

Federal records note February 3, 1913 as the date the thirtieth‑sixth legislature acted to approve the amendment and Secretary Knox’s proclamation of ratification is dated February 25, 1913;

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Feb 1, 2026
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Which 36 states ratified the Sixteenth Amendment and on what dates did each ratify?

, proposed by in 1909, was ratified by the legislatures of thirty-six states between 1909 and early 1913 and was proclaimed part of the Constitution in February 1913 . The official documentary record ...