Chicago Zoning Code entails the codes governing the land use, the planning and designing of the city, the various zoning initiatives, use and design of the open spaces, maintaining and protecting the residential neighborhoods and its character, aiming for sustainable and improving the development of the city and its layout.

The Department of Zoning & Land Use Planning of Chicago apply and implement these Chicago zoning laws which keep in check illegal use of land or illegal zoning and protecting the land rights of the residents of Chicago. This zoning department of Chicago conducts scrutinizing inspections in order to strictly enforce the zoning laws and codes and minimize zoning violations.

http://egov.cityofchicago.org/city/webportal/portalEntityHomeAction.do?entityName=Zoning+and+Land+Use+Planning&entityNameEnumValue=204

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The Dupage Airport is located at West Chicago in Illinois and also acts the reliever airport for the O'Hare Chicago International Airport. They also help the Midway Airport in relieving the air traffic. The owner and operator of the airport is the Airport Authority at Dupage. The total area of this airport is 1,200 acres.

The total aircraft operations that take place in this airport is 99,802 and there are a total of 365 based aircrafts. The history of the airport can be traced back to the early years of 1920s and is presently a good airport and plays an important role in the air traffic of the area.

http://www.dupageairport.com/

http://local.yahoo.com/info-17249611-dupage-airport-authority-west-chicago