25 C.F.R. § 292.6
This section contains criteria for meeting the requirements of 25 U.S.C. 2719(b)(1)(B)(ii), known as the “initial reservation” exception. Gaming may occur on newly acquired lands under this exception only when all of the following conditions in this section are met:
(d) If a tribe does not have a proclaimed reservation on the effective date of these regulations, to be proclaimed an initial reservation under this exception, the tribe must demonstrate the land is located within the State or States where the Indian tribe is now located, as evidenced by the tribe's governmental presence and tribal population, and within an area where the tribe has significant historical connections and one or more of the following modern connections to the land: