25 C.F.R. § 61.11
(b) The Director or Superintendent, when tribal recommendations or determinations are applicable, shall accept the recommendations or determinations of the Tribal Committee unless clearly erroneous.
(c) The Director or Superintendent, upon determining an individual's eligibility, shall notify the individual, parent or guardian having legal custody of a minor, or sponsor, as applicable, in writing of the decision. If an individual files applications on behalf of more than one person, one notice of eligibility or adverse action may be addressed to the person who filed the applications. However, the notice must list the name of each person involved. Where an individual is represented by a sponsor, notification of the sponsor of eligibility or adverse action shall be considered to be notification of the individual.
(d) Except as provided in paragraph (c)(2) of this section, a notice of adverse action is considered to have been made and computation of the appeal period shall begin on the earliest of the following dates: