Code of Federal Regulations Title 25. Indians § 25.151.7 Acquisition of fractional interests

(a) The buyer already owns a fractional interest in the same parcel of land;  or

(b) The interest being acquired by the buyer is in fee status;  or

(c) The buyer offers to purchase the remaining undivided trust or restricted interests in the parcel at not less than their fair market value;  or

(d) There is a specific law which grants to the particular buyer the right to purchase an undivided interest or interests in trust or restricted land without offering to purchase all of such interests;  or

(e) The owner of a majority of the remaining trust or restricted interests in the parcel consent in writing to the acquisition by the buyer.