43 C.F.R. § 30.183
Who may receive a renounced interest in trust or restricted land if the land will descend pursuant to a valid will?
A devisee may renounce an interest in trust or restricted land in favor of any one or more of the following:
(a) A lineal descendant of the testator;
(b) A co-owner;
(c) The Tribe with jurisdiction over the interest; or
(d) Any Indian.