No person shall sell, keep or offer for sale at retail, or conduct any place for the sale at retail of alcoholic liquor within the limits and territory of this municipality without having a license to do so, issued by the Mayor of this municipality in the manner hereinafter provided, and a valid license for such purpose issued by the Illinois Liquor Control Commissioner of the State of Illinois.
A similar valid license issued by the Mayor of this municipality is hereby required for and with respect to each building, location and premises, within the aforesaid territory of this municipality, at or upon which alcoholic liquor is to be sold or kept or offered for sale at retail. (235 ILCS 5/4-1)