The article discusses how Chicago is divided into different zoning districts to regulate land use activities. These districts are defined in the Chicago zoning ordinance and land use ordinance. The goal is to help business owners determine the proper zoning district and business license for their specific business type. The article provides a guide called the License Zoning Reference (LZR) to assist with this process. The key findings include the classification of zoning types and the availability of a zoning map for reference.