Do I have to send the Notice of Appeal to anyone other than the reviewing official?
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
(a) Yes. You must provide copies of your Notice of Appeal to the decision-maker and all interested parties known to you. If you are an individual Indian and are not represented by an attorney, you may request that we make the copies for you and mail your appeal documents to all interested parties.
(b) If you are appealing to the IBIA, you must also send a copy of your Notice of Appeal to the AS-IA and to the Associate Solicitor for Indian Affairs at the same time you send the appeal to the IBIA.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.