(a) The United States owns the records associated with this part if:

(1) They are evidence of the organization, functions, policies, decisions, procedures, operations, or other activities undertaken in the performance of a federal trust function under this part; and

(2) They are either:

(i) Made by or on behalf of the United States; or

(ii) Made or received by a tribe or tribal organization in the conduct of a Federal trust function under this part, including the operation of a trust program under Pub. L. 93-638, as amended, and as codified at 25 U.S.C. 450 et seq.

(b) The tribe owns the records associated with this part if they:

(1) Are not covered by paragraph (a) of this section; and

(2) Are made or received by a tribe or tribal organization in the conduct of business with the Department of the Interior under this part.