Miss. Code § 55-5-17
The United States of America is authorized to acquire by deed or conveyance, gift, will or otherwise lands for the purpose of roadways and parkways as set forth in Sections 55-5-1 through 55-5-17, but this consent is given upon condition that the State of Mississippi shall retain a concurrent jurisdiction with the United States in and over such lands so far that civil process in all cases and such criminal process as may issue under the authority of the State of Mississippi against any person charged with the commission of any crime, without or within said jurisdiction, may be executed thereon in like manner as if this consent had not been given. Power is hereby conferred on the Congress of the United States to pass such laws as it may deem necessary for the acquisition of the said lands and for their incorporation in national roadways, parkways or national parks, and to pass such laws and make or provide for the making of such rules and regulations, of both civil and criminal nature, and to provide punishment therefor as in its judgment may be necessary for the management, control and protection of such lands as may be acquired by the United States under the provisions of the aforesaid sections, including such lands as are acquired not only for highway and parkway and park purposes but also those lands over which scenic easements are acquired for such purposes. Nevertheless, such jurisdiction shall not vest in the United States of America unless and until it, through the proper officer or officers, notifies the governor and, through him, the State of Mississippi that the United States of America assumes concurrent police jurisdiction over the land or lands thus deeded and conveyed. There is saved to the State of Mississippi the right to tax sales of gasoline and other motor vehicle fuels and oils for use in motor vehicles and to tax persons and corporations, their franchises and properties, on all land or lands deeded or conveyed as aforesaid. There is saved to persons residing in or on any of the land or lands deeded or conveyed as aforesaid, the right to vote at all elections within the county in which said land or lands are located, upon like terms and conditions and to the same extent as they would be entitled to vote in such county had not such lands been deeded or conveyed as aforesaid to the United States of America.
Miss. Code § 55-5-17