The ordinance amends the Municipal Code of Chicago to enhance landlord responsibilities regarding tenant safety and security. It introduces a new section, 5-12-071, which mandates that landlords maintain their properties in a safe and secure manner, particularly if the premises are classified as "chronic illegal activity premises." In such cases, landlords are required to hire licensed private security officers to monitor the premises 24/7 for a minimum of 18 months. The ordinance also specifies that these security requirements apply only to buildings with four or more units. Additionally, it outlines the consequences for landlords who fail to comply, allowing tenants to recover damages, procure substitute housing, withhold rent, or terminate their rental agreements under certain conditions.

Furthermore, the ordinance modifies existing sections of the Municipal Code, including the removal of outdated language in Section 8-4-087 regarding chronic illegal activity premises, and repeals Section 13-72-105, which previously addressed security provisions for condominiums and cooperative buildings. The new language clarifies that the governing associations of such buildings must also ensure safety and security, while explicitly stating that city officials and the Police Department do not have a general duty to secure private properties. The ordinance will take effect 10 days after its passage and publication.