The main purpose of this legislation is to create the Cesar E. Chavez and the Farmworker Movement National Historical Park in California and Arizona. This park aims to preserve and highlight the significant contributions of Cesar Chavez and the farmworker movement to American history. The legislation seeks to protect important historical resources, enhance public understanding of these achievements, and support a network of related sites. Key provisions of the legislation include the redesignation of the existing Cesar E. Chavez National Monument as the new historical park.