I can't envision a way they can do this for people licensed under the FCCA:
EDITORIAL: Chicago can do without guns and knives at ralliesEDITORIALS 09/07/2017, 08:49pm
On Wednesday, Ald. Edward Burke (14th) and Ald. Ariel Reboyras (30th) introduced an ordinance that would ban guns, knives, sharp objects and other weapons from public assemblies in the city. ...
Existing laws in Illinois already ban guns at many gatherings. ... Illinois does permit the concealed carrying of firearms, but not at public gatherings that require a permit. Also off limits are parks, where many public gatherings take place.
But not every public assembly requires a permit and is in a park .... Many public assemblies just happen, such as Tuesday’s spontaneous protest at Federal Plaza .... The final ordinance will have to make clear which kinds of events are covered and, if it is to hold up in court, not give authorities a wide berth to make arbitrary decisions.
Even then, given the state’s protections for the concealed carry of weapons, the city’s ordinance might prove to hold up best for limiting other weapons. In addition to guns, the proposed ordinance, as written so far, bans “knives, weapons, sharp objects, shields, fireworks, chains, bats, clubs, sticks, batons, and any other rod-like instrument” at public gatherings.