25 U.S. Code § 458aaa–9 - Federal procurement laws and regulations
Regarding construction programs or projects, the Secretary and Indian tribes may negotiate for the inclusion of specific provisions of division B (except sections 1123, 2303, 2304, and 2313) of subtitle I of title 41 and Federal acquisition regulations in any funding agreement entered into under this part. Absent a negotiated agreement, such provisions and regulatory requirements shall not apply.
Source(Pub. L. 93–638, title V, § 510, as added Pub. L. 106–260, § 4,Aug. 18, 2000, 114 Stat. 726.)