70 ILCS 1825/4.19
Acquire, own, construct, lease, operate and maintain terminals, terminal facilities and port facilities, including, but not limited to: launching, mooring, docking, storing, parking and repairing facilities and services for all waterborne vessels used for pleasure and commercial purposes; parking facilities for motor vehicles and boat trailers used in connection with such vessels; roads and tracks to such facilities; and fixing and collecting just, reasonable, and nondiscriminatory charges for the use of such facilities. The charges so collected shall be used to defray the reasonable expenses of the Port District and to pay the principal of and interest on any revenue bonds issued by the District.
The District may, if it deems desirable, set aside and allocate an area or areas within the lands held by it or acquired by it to be leased to private parties for industrial, manufacturing, commercial or harbor purposes, where such area or areas are not in the opinion of the District immediately required for its primary purpose in the development of harbor and port facilities for the use of public water and land transportation and where such leasing will, in the opinion of the District, aid and promote the development of terminal and port facilities. Such leases may be made for such duration as the District deems desirable, but not to exceed 10 years.
70 ILCS 1825/4.19