25 CFR 170.300 - May tribes use flexible financing to finance IRR transportation projects?
(b) Under 23 U.S.C. 183, the Secretary of Transportation may enter into an agreement for secured loans or lines of credit for IRR projects meeting the requirements contained in 23 U.S.C. 182. Tribes or BIA may service Federal credit instruments. The secured loans or lines of credit must be paid from tolls, user fees, or other dedicated revenue sources.
(c) Tribes may use IRR Program funds as collateral for loans or bonds to finance IRR projects. Upon the request of a tribe, a BIA region will provide necessary documentation to banks and other financial institutions.