The 8th U.S. Circuit Court of Appeals today affirmed a lower court’s decision to dismiss a suit by two private companies challenging the Arkansas law that prohibits digital systems to collect license plate numbers. It agreed the governor and attorney general, named as defendants, were immune from lawsuit.

The companies, Digital Recognition Network, and Vigilant Solutions, had a system of photographing and copmpiling information on vehicle license plates. The information was sold to finance companies to help them repossess vehicles and insurance companies.

A 2013 law made use of automatic license plate reader systems illegal, by private companies or state agencies, but allowed some limited use and record retention by law enforcement agencies for parking enforcement, location of stolen vehicles and the like.