10 ILCS 5/13-1.1
In addition to the list provided for in Section 13-1 or 13-2, the chair of the county central committee, or each township committeeperson in a county with a population of more than 3,000,000, of each of the two leading political parties shall submit to the county board a supplemental list, arranged according to precincts in which they are to serve, of persons available as judges of election, the names and number of all persons listed thereon to be acknowledged in writing to the county chair or township committeeperson, as the case may be, submitting such list by the county board. Vacancies among the judges of election shall be filled by selection from this supplemental list of persons qualified under Section 13-4. If the list provided for in Section 13-1 or 13-2 for any precinct is exhausted, then selection shall be made from the supplemental list submitted by the chair of the county central committee, or each township committeeperson in a county with a population of more than 3,000,000, of the party. If such supplemental list is exhausted for any precinct, then selection shall be made from any of the persons on the supplemental list without regard to the precincts in which they are listed to serve. No selection or appointment from the supplemental list shall be made more than 21 days prior to the date of precinct registration for those judges needed as precinct registrars, and more than 60 days prior to the date of an election for those additional persons needed as election judges. In any case where selection cannot be made from the supplemental list without violating Section 13-4, selection shall be made from outside the supplemental list of some person qualified under Section 13-4.
10 ILCS 5/13-1.1