Promptly after organization of the Modoc Tribe of Oklahoma, the Secretary of the Interior shall publish a notice of such fact in the Federal Register including a statement that such organization completes fulfillment of the requirements of the provisos in section 2 of the Act of January 2, 1975 (
88 Stat. 1920, 1921), and that the land described in section 1 of said Act is held in trust by the United States for the eight tribes named in said Act.