25 U.S.C. § 375d

Upon the final determination of a court having jurisdiction or by decision of the Secretary of the Interior after a period of five years from the death of the decedent, it is determined that a member of the Cherokee, Chickasaw, Choctaw, or Seminole Nations or Tribes of Oklahoma or a person of the blood of said tribes has died intestate without heirs, owning trust or restricted Indian lands in Oklahoma or an interest therein or rents or profits therefrom, such lands, interests, or profits shall escheat to the Nation or tribe from which title to the trust or restricted Indian lands or interest therein was derived and shall be held thereafter in trust by the United States for said nation or tribe.