I live in Chicago, and was not surprised when this happened. I am not sure of the timeline, but am very curious about if Chicago Police did this as an act of solidarity and support to Cicero PD or vice versa. I CAN tell you that when this ordinance was passed, CPD officers were NOT happy about it and it shows quite openly.
Chicago Police are very creative about getting past such internal orders, ordinances, etc. I am sadly willing to say that we will hear more stories like this from Chicago, as CPD has a history of riding the legal envelope on just about everything and their favorite act is to do things that are borderline entrapment, willful misinterpretation of laws and ordinances, aggressively vindictive investigations and surveillances that border on harassment, etc.