Mississippi Code Title 3. State Sovereignty, Jurisdiction and Holidays § 3-5-1

The consent of the State of Mississippi is given, in accordance with the 17th Clause, 8th Section, and of the 1st 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 which has heretofore been or may hereafter be acquired for custom houses, post offices, or other public buildings.