25 CFR § 170.621
What if a Tribe doesn't perform work under a contract or agreement?
February 24, 2021
If a Tribe fails to substantially perform work under a contract or agreement:
(a) For self-determination contracts, the Secretary must use the monitoring and enforcement procedures in 25 CFR 900.131(a) and (b) and ISDEAA, part 900 subpart L (appeals);
(b) For self-governance agreements, the Secretary must use the monitoring and enforcement procedures in 25 CFR part 1000, subpart K; or
(c) For FHWA or BIA TTP Agreements, the Secretaries will use the procedures identified in the Agreements.