The Constitution of the United States · Art. IV, § 3, cl. 1

New States may be admitted by the Congress into this Union; but no new State shall be formed or erected within the Jurisdiction of any other State; nor any State be formed by the Junction of two or more States, or Parts of States, without the Consent of the Legislatures of the States concerned as well as of the Congress.

United States · 1787 and amendments I–XXVII
National Archives transcriptions of the 1787 parchment and amendments I–XXVII; original wording, including superseded provisions.
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