25 CFR §1000.1225

1. (a)Yes, a Tribe/Consortium may request an optional meeting or other informal discussion with the appropriate bureau official(s).
2. (b)To provide reasonable time for consideration, the Tribe/Consortium may request a meeting or other informal discussion to be held with the appropriate bureau official(s) no less than 30 days before the end of the 120-day period, unless the parties agree on another date.
3. (c)For all purposes relating to these meeting or informal discussion procedures, the parties are the designated representatives of the Tribe/Consortium and the appropriate bureau official(s) from whom the waiver is requested.