65 ILCS 5/5-2-18.4
In addition to the requirements of the general election law, a distinct ballot shall be printed for each district for the primary election. At the top of the ballot shall be the following: CANDIDATES FOR NOMINATION FOR MAYOR AND COUNCILMEN OF THE CITY OF.... AT THE PRIMARY ELECTION. Under the sub-title FOR MAYOR shall be placed the following: (VOTE FOR ONE). There shall be placed below the names of the candidates for mayor another sub-title as follows: FOR COUNCILMEN AT LARGE. Following this sub-title there shall be an instruction in this form, to be altered, however, to conform to the facts: VOTE FOR NOT MORE THAN .... (Insert proper number as provided in Section 5-2-12). Following the names of the candidates for councilmen at large, there shall be another sub-title in the following form: FOR DISTRICT COUNCILMAN. Following this sub-title there shall be the following direction: (VOTE FOR ONE). In other respects the form of the ballot shall be controlled by Section 4-3-10.
65 ILCS 5/5-2-18.4