This bill swaps federal land parcels in Harpers Ferry, West Virginia between two government agencies. The U.S. Customs and Border Protection (CBP) will receive about 25 acres of land to expand their Advanced Training Center, while the National Park Service will gain about 71.5 acres to add to Harpers Ferry National Historical Park. The park's boundaries will be adjusted accordingly to reflect these changes.

The land exchange happens without any money changing hands between the agencies. The bill includes a safeguard: if CBP later determines they don't need all 25 acres for their training center, that unused land automatically goes back to the National Park Service and becomes part of the historical park. A professional survey will be conducted to confirm the exact size and legal boundaries of the transferred land to ensure accuracy.

Essentially, this is a straightforward land trade that allows CBP to have more space for training operations while expanding the historical park's protected area. There are no costs involved, and any land CBP doesn't ultimately use will revert to park protection.