U.S. Constitution, Article IV — The States, Section 3, Clause 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.
Notes
Allows Congress to admit new states into the Union. Bars forming or erecting a new state within the jurisdiction of any other state, or by joining two or more states or parts of states, without the consent of the legislatures of the states concerned as well as of Congress.
Use as reference
Lexinter.net | U.S. Const. art. IV, § 3, cl. 1 | https://laws.lexinter.net/constitution/us/article-4/section-3/clause-1