65 ILCS 5/11-13-6
No variation shall be made by the board of appeals in municipalities of 500,000 or more population or by ordinance in municipalities of lesser population except in a specific case and after a public hearing before the board of appeals of which there shall be a notice of the time and place of the hearing published at least once, not more than 30 nor less than 15 days before the hearing, in one or more newspapers published in the municipality, or, if no newspaper is published therein, then in one or more newspapers with a general circulation within the municipality which is published in the county where the municipality is located. This notice shall contain the particular location for which the variation is requested as well as a brief statement of what the proposed variation consists. Any notice required by this Section need not include a metes and bounds legal description of the location for which the variation is requested, provided that the notice includes: (i) the common street address or addresses and (ii) the property index number ("PIN") or numbers of all the parcels of real property contained in the area for which the variation is requested.
65 ILCS 5/11-13-6