25 CFR §1000.1307

Yes, the Secretary may accept funds from another Department for a program or project involving construction and related activities for transfer to the Tribe/Consortium under its funding agreement or construction project agreement, subject to an interagency agreement between the Secretary and the Federal agency, with the concurrence of the Tribe/Consortium before such interagency agreement is finalized, that addresses the purpose, intent, Federal oversight and other responsibilities for the construction program or project, and related activities.