70 ILCS 1570/3
The commissioners of Lincoln Park may, by contract with or deeds from the owner or owners thereof, acquire the riparian rights appurtenant to the shore lands adjacent to and adjoining the submerged lands so granted and so much of the shore lands and interests therein and such right to impose restrictions upon the use thereof as to the commissioners of Lincoln Park shall seem necessary and desirable and in acquiring such rights and interests the commissioners of Lincoln Park may agree with such owner or owners upon a boundary line dividing the submerged and adjacent and adjoining lands to be held and used for the proposed park, boulevard, or driveway extension and the submerged and adjacent and adjoining lands to be retained and held by such owner or owners in lieu of and as compensation for the release of such riparian and other rights and shore lands and interests therein to the Commissioners of Lincoln Park. In all cases where the Commissioners of Lincoln Park shall have acquired or contracted to acquire such shore lands and interests therein and riparian and other rights appurtenant thereto or shall have agreed with any owner or owners upon a boundary line as hereinabove provided, the owner or owners of such shore lands and interests therein and riparian and other rights appurtenant thereto may file a complaint in the Circuit Court of the county in which the lands are situated, in which complaint the Commissioners of Lincoln Park shall be made defendants, praying that the boundary line between the lands of the plaintiffs in the action and the lands acquired by the Commissioners of Lincoln Park under this Act, may be established and defined by the judgment of the Circuit Court. The defendant shall be served with process in the action so instituted in the same manner as in other civil cases, and the proceedings in the cause may be conducted in the same manner as in other civil cases, and the court shall have power by its final judgment in the cause to establish the dividing or boundary line between the lands of the plaintiffs and the lands of the Commissioners of Lincoln Park adjacent thereto, and the line so established by the judgment of the Circuit Court shall be the permanent boundary line of the shore lands which shall not be affected or changed thereafter, either by accretions or erosions, and the owners of the shore lands shall have the right to improve, protect, sell and convey the shore lands up to the boundary line so established, free from any adverse claim in any way arising out of any question as to where the shore line was at any time in the past or as to the title of existing accretions, if any, to the shore land. In the event that any owner or party interested in any of the shore lands shall be unable to contract with the Commissioners of Lincoln Park by reason of minority or other disability, a complaint may be filed by the guardian or next friend or other legal representative of such owner in the circuit court in the county in which such lands are situated, in which the Commissioners of Lincoln Park shall be made defendant, praying that such proceedings may be had and such order or judgment entered as may be necessary or proper to protect the interests of the plaintiff in the shore lands. The defendant shall be served with process in the same manner as in other civil cases and the proceedings in the cause shall be conducted in the same manner as in other civil cases, and the court shall have power by its final judgment upon such terms and conditions as it may deem reasonable and fair, to transfer to the Commissioners of Lincoln Park all the riparian rights of the plaintiff, and also to establish the boundary line between the lands owned by the plaintiff, and the lands of the Commissioners of Lincoln Park.
70 ILCS 1570/3