House File 645 introduces a new legal provision that grants immunity to racing facilities and racetracks from nuisance or property claims brought by surrounding property owners. Specifically, if a racing facility or racetrack was established before a property owner purchased or developed their property, the owner cannot pursue legal action against the facility or racetrack. This immunity applies to claims made against racing facilities and racetracks located in Iowa prior to the date the surrounding property owner acquired or improved their property.

The bill defines a racing facility or racetrack as any designated area where competitive vehicle and motorsport races are held, including the track, spectator areas, garages, and associated grounds or buildings. This legislation aims to protect established racing venues from potential legal challenges that could arise from new developments in their vicinity.