(a) The duration of a funding agreement is one year unless the Department and a Tribe negotiate a multi-year funding agreement or, for an initial funding agreement, a partial-year agreement.

(b) Each funding agreement will remain in full force and effect until the Department and the Tribe execute a subsequent funding agreement, except when:

(1) The Tribe provides notice to the Department that it is withdrawing or retroceding funds for the operation of one or more PSFAs (or portions thereof) identified in the funding agreement;

(2) The Department terminates the funding agreement under 23 U.S.C. 207(f)(2); or

(3) The Department and the Tribe agree otherwise.