25 CFR § 23.105 - How do I contact a Tribe under the regulations in this subpart?
To contact a Tribe to provide notice or obtain information or verification under the regulations in this subpart, you should direct the notice or inquiry as follows:
(a) Many Tribes designate an agent for receipt of ICWA notices. The BIA publishes a list of Tribes' designated Tribal agents for service of ICWA notice in the Federal Register each year and makes the list available on its Web site at www.bia.gov.
(b) For a Tribe without a designated Tribal agent for service of ICWA notice, contact the Tribe to be directed to the appropriate office or individual.
(c) If you do not have accurate contact information for a Tribe, or the Tribe contacted fails to respond to written inquiries, you should seek assistance in contacting the Indian Tribe from the BIA local or regional office or the BIA's Central Office in Washington, DC (see www.bia.gov).