70 ILCS 1300/1
That any park commissioners, park board or board of park commissioners which has heretofore acquired or shall hereafter acquire the title to any lands adjacent to or adjoining upon or penetrating into any public waters in this State or to the submerged lands and bed of such public waters, or any part thereof, or to any riparian or other rights may grant, convey or release any of such lands or rights to any city or village authorized to establish, maintain and regulate airports in, over and upon the public waters bordering thereon. Any such park commissioners, park board or board of park commissioners may grant, convey or release to any such city or village the right to construct and maintain causeways, roadways and bridges and any other appropriate approaches to or connections with any airport, landing field, airdrome or landing float of such city or village over and across any lands and property of such park commissioners, park board or board of park commissioners.
70 ILCS 1300/1