235 ILCS 5/4-1
In every city, village or incorporated town, the city council or president and board of trustees, and in counties in respect of territory outside the limits of any such city, village or incorporated town the county board shall have the power by general ordinance or resolution to determine the number, kind and classification of licenses, for sale at retail of alcoholic liquor not inconsistent with this Act and the amount of the local licensee fees to be paid for the various kinds of licenses to be issued in their political subdivision, except those issued to the specific non-beverage users exempt from payment of license fees under Section 5-3 which shall be issued without payment of any local license fees, and the manner of distribution of such fees after their collection; to regulate or prohibit the presence of persons under the age of 21 on the premises of licensed retail establishments of various kinds and classifications where alcoholic liquor is drawn, poured, mixed or otherwise served for consumption on the premises; to prohibit any minor from drawing, pouring, or mixing any alcoholic liquor as an employee of any retail licensee; and to prohibit any minor from at any time attending any bar and from drawing, pouring or mixing any alcoholic liquor in any licensed retail premises; and to establish such further regulations and restrictions upon the issuance of and operations under local licenses not inconsistent with law as the public good and convenience may require; and to provide penalties for the violation of regulations and restrictions, including those made by county boards, relative to operation under local licenses; provided, however, that in the exercise of any of the powers granted in this Section, the issuance of such licenses shall not be prohibited except for reasons specifically enumerated in Sections 6-2, 6-11, 6-12 and 6-25 of this Act.
However, in any municipality with a population exceeding 1,000,000 that has adopted the form of government authorized under "An Act concerning cities, villages, and incorporated towns, and to repeal certain Acts herein named", approved August 15, 1941, as amended, no person shall be granted any license or privilege to sell alcoholic liquors between the hours of two o'clock a.m. and seven o'clock a.m. on week days unless such person has given at least 14 days prior written notice to the alderperson of the ward in which such person's licensed premises are located stating his intention to make application for such license or privilege and unless evidence confirming service of such written notice is included in such application. Any license or privilege granted in violation of this paragraph shall be null and void.
235 ILCS 5/4-1