25 C.F.R. § 900.32
No. If it is substantially the same as the prior annual funding agreement (except for funding increases included in appropriations acts or funding reductions as provided in section 106(b) of the Act) and the contract is with DHHS or the BIA, the Secretary shall approve and add to the contract the full amount of funds to which the contractor is entitled, and may not decline, any portion of a successor annual funding agreement. Any portion of an annual funding agreement proposal which is not substantially the same as that which was funded previously (e.g., a redesign proposal; waiver proposal; different proposed funding amount; or different program, service, function, or activity), or any annual funding agreement proposal which pertains to a contract with an agency of DOI other than the BIA, is subject to the declination criteria and procedures in subpart E. If there is a disagreement over the availability of appropriations, the Secretary may decline the proposal in part under the procedure in subpart E.
25 C.F.R. § 900.32