65 ILCS 5/4-3-19
Any municipality subject to this Article may, by a vote of the electors thereof as hereinafter provided, elect to require candidates for commissioner to run for a specific office.
The question of requiring candidates for commissioner to run for a specific office shall be certified by the municipal clerk to the proper election authority who shall submit the proposition to the electors of the municipality upon a resolution adopted by the council or upon petition filed with the municipal clerk and signed by electors of the municipality equal in number to at least 10% of the number of votes cast for the candidates for mayor at the last preceding general quadrennial municipal election. The proposition shall be in substantially the following form:
-------------------------------------------------------------------- Shall candidates for commissioner YES in the city (or village) of...... be ----------------------------- required to run for a specific office? NO --------------------------------------------------------------------
If a majority of the electors in the municipality voting upon the question vote in the affirmative, candidates for commission shall thereafter run for the specific office of commissioner of accounts and finances, commissioner of public health and safety, commissioner of streets and public improvements, or commissioner of public property, and the electors of the municipality shall, at each general municipal election thereafter, elect one person to each such specific office, rather than electing four commissioners without further designation.
65 ILCS 5/4-3-19