25 C.F.R. § 1000.2415
(b) The recommended decision must contain the following statement:
Within 15 days of the receipt of this recommended decision, you may file an objection to the recommended decision with the IBIA under 25 CFR 1000.2420. An appeal to the IBIA under shall be filed at the following address: Interior Board of Indian Appeals, Office of Hearings and Appeals, U.S. Department of the Interior, 801 N Quincy Street, Suite 300, Arlington, VA 22203. You shall serve copies of your notice of appeal on the Secretary of the Interior, and on the official whose decision is being appealed. You shall certify to the IBIA that you have served these copies. If neither party files an objection to the recommended decision within 15 days, the recommended decision will become final.