Trees, portions of trees, and other forest products on National Forest System lands may be sold for the purpose of achieving the policies set forth in the Multiple-Use Sustained-Yield Act of 1960, as amended (74 Stat. 215; 16 U.S.C. §§ 528–531), and the Forest and Rangeland Renewable Resources Planning Act of 1974, as amended (88 Stat. 476; as amended, 16 U.S.C. §§ 1600–1614), and the Program thereunder.