735 ILCS 5/13-111
Sections 13-109 and 13-110 of this Act shall not extend to lands or tenements owned by the United States or of this State, nor to school and seminary lands, nor to lands held for the use of religious societies, nor to lands held for any public purpose. Nor shall they extend to lands or tenements when there is an adverse title to such lands or tenements, and the holder of such adverse title is a minor, person under legal disability, imprisoned, out of the limits of the United States, and in the employment of the United States or of this State. Such person shall commence an action to recover such lands or tenements so possessed, as above set out, within 3 years after the several disabilities herein enumerated cease to exist, and shall prosecute such action to judgment, or in case of vacant and unoccupied land, shall, within the time last set out, pay to the person or persons who have paid the same, all the taxes, with interest thereon, at the rate of 12% per annum, that have been paid on such vacant and unimproved land.
The exceptions provided in this Section shall not apply to the provisions of Sections 13-118 through 13-121 of this Act.
735 ILCS 5/13-111