The city of Chicago, Illinois, enacted an ordinance requiring owners of vacant buildings to perform several tasks within 30 days of the building’s vacancy. These tasks include: enclosing and securing the building; posting a sign on the building providing the owner’s and his or her agent’s contact information; acquiring substantial liability insurance for the building and; registering the vacant building with the Department of Buildings. This registration last for six months and costs $250. If the building remains vacant at the end of the six-month period, the owner is required to re-register the building with a fee increase of $250, for a total of $500. The $250 increase applies to all subsequent registrations until the building meets code standards.