625 ILCS 50/1

A notice shall be prominently displayed in each vehicle or conveyance used for the transportation of the public for hire which must state substantially the following: Any person who assaults or harms an individual whom he knows to be a driver, operator, employee or passenger of a transportation facility or system engaged in the business of transportation for hire and who is then performing in such capacity or using such public transportation as a passenger, if such individual is assaulted, commits a Class A misdemeanor, or if such individual is harmed, commits a Class 3 felony.