; (B) the functions to be performed under the funding agreement; and (C) the responsibilities of the Indian Tribe and the Secretary under the funding agreement. (3) Base budget (A) In general A funding agreement shall, at the option of the Indian Tribe, provide for a stable base budget specifying the recurring funds (which may include funds available under section 106(a)) to be transferred to the Indian Tribe, for such period as the Indian Tribe specifies in the funding agreement, subject to annual adjustment only to reflect changes in congressional appropriations. (B) Limitations Notwithstanding subparagraph (A), a funding agreement shall not specify funding associated with a program described in subsection (b)(2) or (c) unless the Secretary agrees. (4) No waiver of trust responsibility A funding agreement shall prohibit the Secretary from waiving, modifying, or diminishing in any way the trust responsibility of the United States with respect to Indian Tribes and individual Indians that exists under treaties, Executive orders, court decisions, and other laws. (n) Amendment The Secretary shall not revise, amend, or require additional terms in a new or subsequent funding agreement without the consent of the Indian Tribe, unless such terms are required by Federal law. (o) Effective date A funding agreement shall become effective on the date specified in the funding agreement. (p) Existing and subsequent funding agreements (1) Subsequent funding agreements Absent notification from an Indian Tribe that the Indian Tribe is withdrawing or retroceding the operation of one or more programs identified in a funding agreement, or unless otherwise agreed to by the parties to the funding agreement or by the nature of any noncontinuing program, service, function, or activity contained in a funding agreement— (A) a funding agreement shall remain in full force and effect until a subsequent funding agreement is executed, with funding paid annually for each fiscal year the agreement is in effect