The ban on chewing tobacco and other smokeless tobacco products at Chicago ballparks takes effect today. The ban includes players on the field. The City Council approved the the ordinance championed by Ald. Ed Burke (14) and Ald. Patrick Daley Thompson (11), whose ward includes U.S. Cellular Field, in March. Violators will face a minimum $250 fine for the first violation, a $500 fine for the second violation, and a $2,500 fine for each additional violation that occurs within one year of the first offense.