Acquisition of a fractional land interest by an individual Indian or a tribe in trust status can be approved by the Secretary only if:

(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.