Chicago Landlord

Public Act 97-470 (HB 1233) requires landlords in cook county to change or rekey the locks for each unit when the unit is vacated by one tenants before a new lease begans. So everytime you have a apartment turn over you have to re-key that apartment. The law limits the liability of the landlord to damages due to theft due to the apartment not being rekeyed.

If you want to read up on this law and others effecting rental units in Illinois check out this web site: http://www.illinoisrealtor.org/sites/illinoisrealtor.org/files/Governmentaffairs/2011endofsession.pdf
You need to scroll down to page 11 for the apartment rental laws.