Section 61
SEC. 61. The lands comprised in classes (a), (b), and (c) of section fifty-nine shall be disposed of to private parties by lease only and not otherwise, as soon as the President, upon recommendation by the Secretary of Agriculture and Commerce shall declare that the same are not necessary for the public service and are open to disposition under this chapter. The lands included in class (d) may be disposed of by sale or lease under the provisions of this Act.