1988—Pub. L. 100–528 struck out after first sentence “Not more than 600 acres of land, however, shall be acquired in fee by purchase or condemnation, but neither this limitation nor any other provision of law shall preclude such acquisition of the fee title to other lands and its immediate reconveyance to the former owner with such covenants, restrictions, or conditions as will accomplish the purposes of this section: Provided, That the cost to the Government of any such transaction shall not exceed the reasonable value of the covenants, restrictions, or conditions thereby imposed on the property.”

1975—Pub. L. 93–608 struck out requirement that Secretary report to Congress at least once each year on any acquisition made or agreement entered into under provisions of this section.

Pub. L. 95–625, title III, § 319(a), Nov. 10, 1978, 92 Stat. 3488, as amended by Pub. L. 100–528, § 1(b), Oct, 25, 1988, 102 Stat. 2649, provided that: “In furtherance of the purposes of the Act entitled ‘An Act to provide for the protection and preservation of the Antietam Battlefield in the State of Maryland’, approved April 22, 1960 (74 Stat. 79) [this section], and other Acts relative thereto [see section 430nn of this title], the Secretary is hereby authorized to acquire the additional lands generally depicted on the map entitled ‘Boundary Map, Antietam National Battlefield, Washington County, Maryland,’ numbered 302–80.005–A and dated June 1977.”