25 U.S.C. § 139 — Appropriations for subsistence

This section lets the government cover a shortfall in supplies for Indian tribes using leftover funds. The Secretary of the Interior, acting under the President's direction, may take any surplus money left over in appropriations for buying subsistence supplies for Indian tribes and use it to make up a shortage, if one happens. The total amount used this way cannot exceed $25,000 combined across all tribes. Any time this money is shifted, the Secretary must report the details, and the reasons for it, to Congress — at the very next session of Congress after the shift happens.