Ind. Code § 8-10-5-20
The board of directors of a port authority may enter into such contracts or other arrangements with the United States government, or any department thereof, with persons, railroads, or other corporations, with public corporations, and with the state government of this or other states, with counties, municipalities, townships, or other governmental agencies created by or under the authority of the laws of the state of Indiana, including sewerage, drainage, conservation, conservancy, or other improvement districts in this or other states as may be necessary or convenient for the exercise of powers granted by the provisions of this chapter, including the making of surveys, investigations, or reports thereon, provided that such contracts or arrangements shall not be in violation of the Indiana Constitution. The board of directors may purchase, lease, or acquire land or other property in any county of the state of Indiana and in adjoining states for the accomplishment of an authorized purpose of the port authority, or for the improvement of the harbor and port facilities over which the port authority may have jurisdiction, and may let contracts or spend money for making such improvements or development of port facilities in adjoining states.
IC 8-10-5-20