42 CFR § 137.334
What happens if the Secretary fails to notify the Self-Governance Tribe of a decision to approve or reject a final construction project proposal within the time period allowed?
June 11, 2020
If the Secretary fails to notify the Self-Governance Tribe of the decision to approve or reject within 30 days (or a longer period if agreed to by the Self-Governance Tribe in writing), then the proposal will be deemed approved by the Secretary.