25 CFR § 502.12
Indian lands
February 24, 2021
Indian lands means:
(a) Land within the limits of an Indian reservation; or
(b) Land over which an Indian tribe exercises governmental power and that is either—
(1) Held in trust by the United States for the benefit of any Indian tribe or individual; or
(2) Held by an Indian tribe or individual subject to restriction by the United States against alienation.