25 U.S.C. § 63 : US Code - Section 63: Consolidation of agencies

Search 25 U.S.C. § 63 : US Code - Section 63: Consolidation of agencies

The President may, in his discretion, consolidate two or more
agencies into one, and where Indians are located on reservations
created by Executive order he may, with the consent of the tribes
to be affected thereby, expressed in the usual manner, consolidate
one or more tribes, and abolish such agencies as are thereby
rendered unnecessary.