To the extent that programs, functions, services, or activities (or portions thereof) carried out by Indian tribes under this part reduce the administrative or other responsibilities of the Secretary with respect to the operation of Indian programs and result in savings that have not otherwise been included in the amount of tribal shares and other funds determined under section
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(c) of this title, the Secretary shall make such savings available to the Indian tribes, inter-tribal consortia, or tribal organizations for the provision of additional services to program beneficiaries in a manner equitable to directly served, contracted, and compacted programs.