Illinois law permits people to carry concealed firearms after obtaining a valid license. Ameren has workplace policies which prevent employees from threatening or intimidating co-employees, and from having unauthorized firearms on its property. After an employee engaged in heated arguments with his supervisor, a consensual search disclosed a gun in the Employee's vehicle.l He had a valid Illinois license to carry the gun. Ameren then fired the employee. An Arbitrator re-instated the employee, finding that the heated arguments were not threatening or intimidating, and that the Illinois Concealed and Carry Statute overrode the company policy barring weapons on Company property. The District Court vacated the arbitration award, but the Court of Appeals rei-instated it, noting that judicial review of Labor Arbitration Awards is "very limited" Ameren Illinois Co v. International Brotherhood of Electrical Workers Local 51 (U.S. Seventh Circuit, Oct 12, 2018).