Champaign City Council Challenges

I've only seen a County level Electoral Board hearing, so I imagine it will be similar to that (explanation of a county electoral board here, notes from that board hearing here, and a City of Champaign example here). The composure from the statutes appears to be a three person body with the mayor as chairman, the city clerk and the longest serving city council member:

From the News-Gazette:

Challenges filed on nominating petitions of Champaign, Danville candidates
...
In Champaign, the clerk's office said Chris Beaird is challenging the petitions of Kenton Elmore, who is running for an at-large seat on the city counicl.

Also, Philip Fiscella is objecting to the candidacies of mayoral candidate Azark Cobbs and city council candidates Michael LaDue and Pattsi Petrie...

Specifics on these objections were not available. Generally, they cover complaints such as not enough valid voter signatures or filling out the paperwork improperly.

Electoral boards in each city will hear evidence and decide if the candidates will stay on the ballot.

Full blurb here.