A person must not enter into an agreement with any other person to not compete in rental pricing, fees, or any other rental term for residential rental units in Illinois.

A person must not engage in price coordination for residential rental units in Illinois, including through the sale, licensure, or provision of any service or product that involves price coordination.

A person must not facilitate an agreement between two or more persons to not compete on rental pricing, fees, or any other rental term for residential rental units in Illinois.

A person must not use, subscribe to, contract for, or pay for services that involve price coordination or that encourage or facilitate an agreement with other persons to not compete on any rental term for residential rental units in Illinois.

Landlords must not subscribe to, contract with, or otherwise exchange anything of value for the services of a coordinator that collects rental data from multiple landlords, computationally analyzes it, and recommends rental prices, lease terms, or occupancy levels.

Coordinators must not facilitate agreements among landlords not to compete with respect to residential dwelling units, including by performing a coordinating function (collecting multi-landlord rental data, computationally analyzing it, and recommending prices, terms, or occupancy levels).

Landlords must not use, rely upon, or cause another person to use any algorithmic device that uses, incorporates, or was trained with nonpublic competitor data when setting or adjusting residential rent amounts.

Real estate lessors, and their agents and subcontractors, must not subscribe to, contract with, or exchange anything of value for the services of a service provider that collects rental market data, computationally processes it, and recommends rental prices or lease terms.

Landlords must not use, rely on, or cause another person to use an algorithmic device that uses, incorporates, or was trained on nonpublic competitor data to set the amount of rent charged to a tenant for a residential rental unit.

Landlords must not use, employ, rely upon, or cause another person to use algorithmic pricing that uses, incorporates, or was trained with competitor data when setting or adjusting residential rent.

Landlords must not use, employ, rely upon, or cause another person to use an algorithmic device that uses, incorporates, or was trained with nonpublic competitor data when setting or adjusting residential rent.

Landlords, property owners, property managers, agents, and persons acting on their behalf must not employ, use, knowingly rely upon, or cause another to employ, use, or rely upon an algorithmic device that incorporates, uses, or was trained using nonpublic competitor data to determine, fix, or suggest residential rent amounts. Exemptions apply for government housing program compliance tools, aggregate historical market data reporting without individualized recommendations, and bona fide internal recordkeeping systems.