Section 13
SEC. 13. Section sixty-two of the same Act is hereby amended to read as follows: "SEC. 62. The sale of the lands comprised in class (d) of section fifty-six shall, among others, comprise the following conditions: "(a) The purchaser shall make improvements of a permanent character appropriate for the purpose for which the land is purchased, and shall commence work thereon within six months from the receipt of the approval of the purchase; otherwise the Secretary of Agriculture and Natural Resources may, upon recommendation by the Secretary of Commerce and Communications, rescind the contract. "(b) The purchase price shall be paid cash down or in annual installments, not to exceed ten. "The contract of sale may contain other conditions not inconsistent with the provisions of this Act."