25 CFR §518.11

Yes. A tribe that holds a certificate of self-regulation has a continuing duty to advise the Office of Self-Regulation within 10 business days of any changes in circumstances that are material to the approval criteria in § 518.5 and may reasonably cause the Commission to review and revoke the tribe's certificate of self-regulation. Failure to do so is grounds for revocation of a certificate of self-regulation. Such circumstances may include, but are not limited to, a change of primary regulatory official; financial instability; or any other factors that are material to the decision to grant a certificate of self-regulation.