25 CFR §1000.2501

1. (a)A Tribe/Consortium participating in self-governance must ensure that internal measures are in place to address, pursuant to Tribal law and procedures, conflicts of interest in the administration of programs carried out under a compact and funding agreement.
2. (b)The Tribe/Consortium and the Secretary may agree that using the Tribe's/Consortium's own written code of ethics satisfies the objectives of the personal conflicts and organizational conflicts provisions of this subpart, in whole or in part.
3. (c)When the Secretary and the Tribe/Consortium agree to use the Tribe's/Consortium's written codes or measures, the funding agreement will reflect that and the agreed-upon provisions shall be followed, rather than the related provisions of this subpart.