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.

Upon the vesting of title in the United States to such additional lands as may be designated by the Secretary of the Interior as necessary and desirable for the purposes of the Chalmette Unit of the Jean Lafitte National Historical Park and Preserve, such lands shall become a part of the said Unit and shall be subject to all laws, rules, and regulations applicable thereto: Provided, however, That the total area included within the said Unit and any enlargement thereof shall not exceed five hundred acres.

The Secretary of the Interior is authorized, in his discretion, to acquire in behalf of the United States, through donations or by purchase at prices deemed by him reasonable, or by condemnation in accordance with section 3113 of title 40, lands, buildings, structures, and other property, or interests therein, located within the boundaries of the Chalmette Unit of the Jean Lafitte National Historical Park and Preserve as fixed and determined by this subchapter, the title to such property and interests to be satisfactory to the Secretary of the Interior, and to accept donations of funds for the acquisition and maintenance thereof: Provided, That payment for such property or interests shall be made solely from donated funds.

All Acts or parts of Acts inconsistent with this subchapter are repealed to the extent of such inconsistency.