In addition to the list provided for in Section 14-3.1, the chair of the county central committee, or each ward committeeperson in a municipality of 500,000 or more inhabitants, of each of the 2 leading political parties shall furnish to the board of election commissioners a supplemental list, arranged according to precinct 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 ward committeepersons, as the case may be, submitting such list by the board of election commissioners. The board of election commissioners shall select from this supplemental list persons qualified under Section 14-1, to fill vacancies among the judges of election. If the list provided for in Section 14-3.1 for any precinct is exhausted, then selection shall be made from the supplemental list furnished by the chair of the county central committee or ward committeepersons, as the case may be, 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 14-1, selection shall be made from outside the supplemental list of some person qualified under Section 14-1.