Changes the law regarding firearm concealed carry permits

HB 328 updates regulations for public mass transportation systems, including light rail and buses operated by the bi-state development agency. It prohibits carrying weapons (including firearms) on transit facilities and conveyances, with limited exceptions for law enforcement officers or unloaded rifles/shotguns in a closed container. The bill also bans alcohol consumption, smoking, littering, and obstructive behavior on transit, requiring fare payment and compliance with agency directives. These rules apply directly to all passengers and employees using public transportation services.