Proposing an amendment to the Constitution of the United States to provide that new States may be admitted to the United States upon a concurrence of two thirds of each house of Congress.

H.R.J. Res. 99 is a joint resolution introduced in the 119th Congress that proposes a constitutional amendment to change how new states can be admitted. If ratified, the amendment would allow Congress to admit new states into the United States with the concurrence of two-thirds of each House, instead of relying on the current pathways typically tied to broader constitutional amendment procedures. Like any constitutional amendment, this change would only take effect after ratification by three-fourths of the states (via their legislatures, per the text). In short, the proposal creates a new congressional threshold for admitting new states, but the change would only become law if the states approve the amendment itself.