25 CFR § 900.219
How does an Indian tribe, tribal organization, or Federal agency submit a claim?
February 24, 2021
(a) An Indian tribe or tribal organization shall submit its claim in writing to the awarding official. The awarding official shall document the contract file with evidence of the date the claim was received.
(b) A Federal agency shall submit its claim in writing to the contractor's senior official, as designated in the contract.