Senate Bill 142 aims to prohibit the use of algorithmic software in determining rental rates or occupancy levels for residential housing in Wisconsin. The bill defines algorithmic software as any software that utilizes algorithms to analyze nonpublic competitor data related to rent or occupancy, which landlords may use to make decisions about their properties. Under this legislation, it is illegal for any person to sell, license, or provide such software to residential landlords. Violations can lead to investigations by the Department of Agriculture, Trade and Consumer Protection, the attorney general, or district attorneys, who can seek injunctions or impose civil forfeitures of up to $1,000 per violation. Additionally, tenants are empowered to file civil actions for damages or seek injunctive relief if their landlords violate these prohibitions.

The bill also includes provisions that render any rental agreement void if it contains clauses that waive a landlord's obligation to comply with the new regulations or that discourage tenants from pursuing legal action for violations. This ensures that tenants are protected and can seek justice without being impeded by unfair lease terms. Overall, Senate Bill 142 seeks to enhance tenant rights and promote fair housing practices by eliminating the influence of algorithmic decision-making in the rental market.