55 ILCS 5/5-12011
The board of appeals shall also hear and decide appeals from and review any order, requirement, decision or determination made by an administrative official charged with the enforcement of any ordinance or resolution adopted pursuant to this Division.
It shall also hear and decide all matters referred to it or upon which it is required to pass under any such ordinance or resolution or under the terms of this Division. Where a public hearing before a board of appeals is required by this Division or by any ordinance or resolution under the terms of this Division, notice of each hearing shall be published at least 15 days in advance thereof in a newspaper of general circulation published in the township or road district in which such property is located. If no newspaper is published in such township or road district, then such notice shall be published in a newspaper of general circulation published in the county and having circulation where such property is located. The concurring vote of 3 members of a board consisting of 5 members or the concurring vote of 5 members of a board consisting of 7 members is necessary to reverse any order, requirement, decision or determination of any such administrative official or to decide in favor of the applicant any matter upon which it is required to pass under any such ordinance or resolution, or to effect any variation in such ordinance or resolution, or to recommend any variation or modification in such ordinance or resolution to the county board. An appeal may be taken by any person aggrieved or by any officer, department, board or bureau of the county. An appeal shall be taken within such time as is prescribed by the board of appeals by general rule by filing with the officer from whom the appeal is taken and with the board of appeals a notice of appeal, specifying the grounds thereof. The officer from whom the appeal is taken shall forthwith transmit to the board all the papers constituting the record upon which the action appealed from was taken.
An appeal stays all proceedings in furtherance of the action appealed from, unless the officer from whom the appeal is taken certifies to the board of appeals after the notice of appeal has been filed with him that by reasons of facts stated in the certificate a stay would, in his opinion, cause imminent peril to life or property, in which case proceedings shall not be stayed otherwise than by a restraining order which may be granted by the board of appeals or by a court on application, on notice to the officer from whom the appeal is taken and on due cause shown.
55 ILCS 5/5-12011