This legislation authorizes the Secretary of the Interior to acquire approximately 6,100 acres of land to adjust the boundary of Big Bend National Park in Texas. These specific land parcels are generally depicted on a designated map, which will be made available for public inspection. A key provision of this Act stipulates that land acquisition must occur solely through donation or exchange , explicitly prohibiting the use of eminent domain or condemnation . Upon successful acquisition, the Secretary is required to revise the park's boundary to include these new lands. The newly incorporated areas will then be administered as an integral part of Big Bend National Park, subject to all applicable laws and regulations.