25 U.S.C. § 426 — Agreements with Indians not affected

This section makes clear that nothing in the wider act it belongs to can change, repeal, or modify any agreement or treaty made with Indian tribes about disposing of their lands, or about land ceded to the United States to be sold for the tribes' benefit. Money from those sales must still go into the U.S. Treasury. The disposal of that land must keep following whatever the original treaties or agreements say. The only exception is that sections 161 and 162 of title 43 still apply and can affect how this works.