Subject to applicable regulations under chapters 1 to 11 of title 40 and division C (except sections 3302, 3306(f), 3307(e), 3501(b), 3509, 3906, 4104, 4710, and 4711) of subtitle I of title 41, the Secretary of the Interior is authorized in his discretion to sell and convey by deed or patent, under such terms and conditions as he may prescribe, at not less than their appraised value, nonreservation Government tracts or plants or tribal administrative plants or reserves, or parts thereof, not exceeding forty acres in area and not exceeding $2,000 in value, not longer needed for Indian administrative or allotment purposes, and small unallotted tracts not exceeding forty acres, where a sale will serve the tribal interests. All sales made under this section shall be at public auction, to the highest and best bidder.

And the Secretary of the Interior is further authorized, where a tract to be disposed of under this section or any other Act authorizing the disposition of tribal lands requires survey as basis for a deed or patent, to accept from the grantee, in addition to the purchase price, an amount sufficient to cover the survey costs.

The net proceeds of sale of any tribal site, plant, or tract shall be deposited in the Treasury of the United States to the credit of the Indians owning the same, to be disposed of for their benefit in accordance with existing law.