Mo. Rev. Stat. § 12.030: Consent given United States to acquire land by purchase or condemnation for certain purposes.

The consent of the state of Missouri is given, in accordance with the seventeenth clause, eighth Section of the first Article of the Constitution of the United States, to the acquisition by the United States by purchase, condemnation, or otherwise, of any land in this state as sites for customhouses, courthouses, post offices, arsenals, forts and other needful buildings required for military purposes.