The lands in Federal ownership located in Chalmette, Louisiana, in sections 10 and 21, township 13 south, range 12 east, Saint Helena meridian, on which there has been erected a monument pursuant to the provisions of section 450a of this title to the memory of the soldiers who fell in the Battle of New Orleans in the War of 1812, including the national cemetery at Chalmette, Louisiana, are designated as the Chalmette Unit of the Jean Lafitte National Historical Park and Preserve.