25 CFR § 292.3
How does a tribe seek an opinion on whether its newly acquired lands meet, or will meet, one of the exceptions in this subpart?
February 24, 2021
(a) If the newly acquired lands are already in trust and the request does not concern whether a specific area of land is a “reservation,” the tribe may submit a request for an opinion to either the National Indian Gaming Commission or the Office of Indian Gaming.
(b) If the tribe seeks to game on newly acquired lands that require a land-into-trust application or the request concerns whether a specific area of land is a “reservation,” the tribe must submit a request for an opinion to the Office of Indian Gaming.