35 ILCS 200/18-75
If the taxing district is located entirely in one county, the notice shall be published in an English language newspaper of general circulation published in the taxing district, or if there is no such newspaper, in an English language newspaper of general circulation published in the county and having circulation in the taxing district.
If the taxing district is located primarily in one county but extends into smaller portions of adjoining counties, the notice shall be published in a newspaper of general circulation published in the taxing district, or if there is no such newspaper, in a newspaper of general circulation published in each county in which any part of the district is located.
If the taxing district includes all or a large portion of 2 or more counties, the notice shall be published in a newspaper of general circulation published in each county in which any part of the district is located.
If a taxing district has a website maintained by the full-time staff of the taxing district, then, in addition to the other requirements of this Section, for a period of not less than 30 consecutive days, the notice shall be posted on or near the top of the website's homepage or on a page accessible through a direct link from the homepage . The failure of a taxing district to post the notice on its website shall not invalidate the notice or any action taken on the tax levy.
35 ILCS 200/18-75