Section 47
SEC. 47. All lots except those claimed by or belonging to private owners and claimants and excepting such lots and tracts as may be reserved for parks, public buildings, and other public uses, shall be sold under the direction of the Chief of the Bureau of Public Lands, as hereinafter in this chapter provided, and the Chief of the Bureau of Public Lands, with the approval of the Secretary of the Interior, shall prescribe rules and regulations for the disposal of lots hereunder.