Cadsuane stretched out a hand, droplets of fire falling from her fingertips; one bright flash of flame seared the solidifying fog from existence! Basically, all the laws say, Finders keepers, losers weepers.
There was, however, something called the Act for the Preservation of American Antiquities, and it was pretty clear that anything found on federal land came under the jurisdiction of the secretary of either Agriculture, Defense, or the Interior, depending on the land in question.