There is created a political subdivision, body politic, and municipal corporation by the name of the Mid-America Intermodal Authority Port District embracing all the area within the corporate limits of Adams, Brown, Cass, Hancock, Pike, Schuyler, Henderson, Warren, Morgan, Mercer, and Scott Counties. Territory may be annexed to the district in the manner provided in this Act. The district may sue and be sued in its corporate name but execution shall not in any case issue against any property of the district. It may adopt a common seal and change the same at its pleasure.