The liquor control commissioner has the following powers, functions and duties with respect to licenses, other than licenses to manufacturers, importing distributors, distributors, foreign importers, non-resident dealers, non-beverage users, brokers, railroads, airplanes and boats.
(A) To grant and or suspend for not more than 30 days or revoke for cause all local licenses issued to persons for premises within his jurisdiction;
(B) To enter or to authorize any law enforcing officer to enter at any time upon any premises licensed hereunder to determine whether any of the provisions of ILCS Ch. 235, Act 5, § 6-21 or any rules or regulations adopted by him or by the state commission have been or are being violated, and at such time to examine the premises of the licensee in connection therewith;
(C) To notify the Secretary of State where a club incorporated under the "General Not for Profit Corporation Act" or a foreign corporation functioning as a club in the city under a certificate of authority issued under that Act has violated this Act by selling or offering for sale at retail alcoholic liquors without a retailer's license;
(D) To receive complaint from any citizen within his jurisdiction that any of the provisions of ILCS Ch. 235, Act 5, § 621, or any rules or regulations adopted pursuant hereto, have been or are being violated and to act upon such complaints in the manner thereinafter provided;
(E) To receive local license fees and pay the same forthwith to the city treasurer;
(F) In municipalities of 500,000 or more persons, the liquor control commissioner shall also have the power to levy fines in accordance with ILCS Ch. 235, Act 5, § 7-5.
(ILCS Ch. 235, Act 5, § 4-4)