The main purpose of this legislation is to protect a specific area of public land known as Oak Flat in Arizona from being transferred to a foreign mining company for copper extraction. The bill aims to repeal a previous law that allowed this transfer, arguing that it would primarily benefit foreign corporations and not the United States or its citizens. Key provisions of the legislation include the repeal of a section from a past law that mandated the U.S. Forest Service to hand over Oak Flat to Resolution Copper, a joint venture between two major foreign mining companies, Rio Tinto and BHP.