The Secretary of the Interior is authorized and directed to make an examination of the Pea Ridge Battlefield with a view to determining the area or areas thereof deemed desirable for inclusion in the Pea Ridge National Military Park and which—except for not more than twenty acres of any other lands adjacent to such battlefield found by the Secretary to be necessary to carry out the provisions of sections 430aa to 430ee of this title—lie within the lands particularly described as follows: sections 17, 18, 19, 20, 29, 30, 31, 32, and 33, all township 21 north, range 28 west, Fifth principal meridian; sections 4, 5, 6, 7, and 8, all township 20 north, range 28 west, Fifth principal meridian; sections 13, 14, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32, 33, 34, 35, and 36, all township 21 north, range 29 west, Fifth principal meridian; and sections 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12, all township 20 north, range 29 west, Fifth principal meridian.