Ind. Code § 4-20.5-19-1

Sec. 1. If the United States government or an agency of the United States government is authorized to acquire jurisdiction of a memorial or historic grounds and buildings in Indiana to be preserved and maintained by the United States government or an agency of the United States government as a national monument, the agency of the state having charge of the memorial or historic grounds and buildings may, with the approval of the governor, cede all jurisdiction of the memorial, property, buildings, and appurtenances to the United States government or the agency of the United States government.