42 C.F.R. § 137.418
Every decision in any of the areas listed in § 137.415 must contain information which shall tell the Indian Tribe where and when to file the Indian Tribe's appeal. Each decision shall include the following statement:
Within 30 days of the receipt of this decision, you may request an informal conference under 42 CFR 137.421 , or appeal this decision under 42 CFR 137.425 to the Interior Board of Indian Appeals (IBIA). Should you decide to appeal this decision, you may request a hearing on the record. An appeal to the IBIA under 42 CFR 137.425 shall be filed with the IBIA by certified mail or by hand delivery at the following address: Board of Indian Appeals, U.S. Department of the Interior, 801 North Quincy St., Suite 300, Arlington, VA 22203. You shall serve copies of your Notice of Appeal on the Secretary and on the official whose decision is being appealed. You shall certify to the IBIA that you have served these copies.
42 C.F.R. §137.418