70 ILCS 1265/1
Every board of park commissioners or park authorities shall have the power to connect any public park, boulevard or driveway under its control, with any part of any incorporated city, town or village, the territory of which shall touch, bound or be contiguous to such public park, boulevard or driveway, by selecting and taking any connecting street or streets, or parts thereof, leading to such park, boulevard or driveway, and shall have the power to accept and add to any park or parks under their control, any street, in its entirety or parts thereof which adjoins or runs parallel with any boundary line of the same: Provided, that the consent of the corporate authorities having control of any such street or streets or part thereof so far as selected and taken shall first be obtained.
And provided, further, that unless such street or streets or part or parts thereof shall have been previously restricted to boulevard or pleasure driveway purposes pursuant to law, the consent of the owners of at least two-thirds of the frontage of all property abutting upon said street or streets or part or parts thereof shall also first be obtained.
The corporate authorities or the corporate authorities with the consent of the owners of at least two-thirds of the frontage of abutting property where consent of such owners was required for the taking, may re-take any street or part thereof taken under this Section by sending written notice of their action to the board of park commissioners or park authorities. The street or part thereof so re-taken shall revert to the corporate authorities 30 days after sending the notice. The corporate authorities shall assume any contractual obligation for improvement of the streets entered into by the board of park commissioners or park authorities prior to receipt of the notice.
70 ILCS 1265/1