16 U.S. Code § 426h - Ascertaining and marking lines of battle
It shall be lawful for the authorities of any State having troops engaged in the battle of Stones River to enter upon the lands and approaches of the Stones River National Battlefield for the purpose of ascertaining and marking the lines of battle of troops engaged therein:
“Stones River National Battlefield” substituted in text for “Stones River National Park” in view of redesignation of Stones River National Military Park as Stones River National Battlefield by Pub. L. 86–443. See section 426
Transfer of administrative functions of park, see note set out under section 426 of this title.