The "Joshua Tree National Park Expansion Act" proposes to expand the boundary of Joshua Tree National Park by approximately 20,149 acres , amending the California Desert Protection Act of 1994. This expansion involves transferring administrative jurisdiction of the added land from the Bureau of Land Management to the National Park Service . The bill authorizes the Secretary of the Interior to acquire land and interests within the park's new boundary through methods such as donation, purchase from willing sellers, exchange, or transfer. However, land owned by the State of California or its subdivisions can only be acquired by donation or exchange. Additionally, the legislation redesignates the Cottonwood Visitor Center at Joshua Tree National Park as the " Dianne Feinstein Visitor Center ."