To amend the Act of June 18, 1934, to reaffirm the authority of the Secretary of the Interior to take land into trust for Indian tribes, and for other purposes.

Amends the Indian Reorganization Act to make it applicable to all federally recognized Indian tribes, regardless of when any tribe became recognized. (This effectively overrules the Supreme Court's decision in Carcieri v. Salazar, which held that the Secretary of the Interior could not take land into trust for a specified tribe because that tribe had not been under federal jurisdiction when the Act was enacted.)