25 CFR § 224.118
How must the Tribe respond to the Secretary's notice of the opportunity for a hearing?
February 24, 2021
The Tribe must respond in writing to the Secretary's notice of the opportunity for a hearing within 20 days of receipt of the notice by requesting a hearing or declining to request a hearing. If the Tribe does not respond within the time period, the Secretary will proceed with making a decision without further input from the Tribe.