A group of Republican lawmakers is suing to block a controversial bill they say could drastically impact Illinois’ legal and business climate. Senate Bill 328 would allow companies to be sued in Illinois—even if the case has no direct ties to the state—so long as it involves claims under the Uniform Hazardous Substances Act.

The GOP suit, filed in Sangamon County, also challenges the way the bill was passed, targeting a common legislative tactic known as “gut-and-replace.” That method allows lawmakers to substitute major content into bills at the last minute, avoiding full constitutional readings.

Senate GOP Leader John Curran says the practice undermines transparency and contributes to Illinois’ poor reputation for business and ethics. The bill passed in the final hours of session on mostly party lines. Governor JB Pritzker has not yet signed it.

A second lawsuit over the same procedural issue has been filed by the Illinois Freedom Caucus, focusing on the state’s new budget. A hearing in that case is set for July 3.