16 U.S. Code § 430p - Right of States to enter and mark battle lines
It shall be lawful for the authorities of any State having had troops at the Battle of Monocacy to enter upon the lands and approaches of the battlefield for the purpose of ascertaining and marking the line of battle of troops engaged therein:
1976—Pub. L. 94–578 substituted “battlefield” for “Monocacy National Military Park” and “:
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