25 C.F.R. § 81.33
How does the Secretarial Election Board respond to challenges?
All challenges must be resolved by close of business on the third day after the date of the challenge deadline established by the Secretarial Election Board and all determinations of the Secretarial Election Board are final for the purpose of determining who can vote in the Secretarial election.
(a) If the challenge was received after the deadline, the Secretarial Election Board must deny the challenge.
(b) If the challenge was received on or before the deadline, the Secretarial Election Board will decide the challenge by reviewing the documentation submitted. Thereafter, the Secretarial Election Board will include the name of any individual whose name should appear or remove the name of any individual who should not appear on the Registered Voters List.