(10 ILCS 5/7-14.1) (from Ch. 46, par. 7-14.1)
    Sec. 7-14.1. Delegates and alternate delegates to national nominating conventions shall be chosen according to one of the following alternative methods of allocating delegates for election. The State central committee of each political party established pursuant to this Article 7 shall certify to the State Board of Elections, not less than 30 days prior to the first date for filing of petitions for election as delegate or alternate delegate to a national nominating convention, which of the following alternatives it wishes to be utilized in allocating the delegates and alternate delegates to which Illinois will be entitled at its national nominating convention. The State Board of Elections shall meet promptly and, not less than 20 days prior to the first date for filing of such petitions, shall publish and certify to the county clerk in each county the number of delegates or alternate delegates to be elected from each congressional district or from the State at large or State convention of a political party, as the case may be, according to the method chosen by each State central committee. If a State central committee fails to certify to the State Board of Elections its choice of one of the following methods prior to the aforementioned meeting of the State Board of Elections, the State Board of Elections shall certify delegates for that political party pursuant to whichever of the alternatives below was used by that political party pursuant to whichever of the alternatives below was used by that political party in the most recent year in which delegates were selected, subject to any subsequent amendments.
    Prior to the aforementioned meeting of the State Board of Elections at which the Board shall publish and certify to the county clerk the number of delegates or alternate delegates to be elected from each congressional district or the State at large or State convention, the Secretary of State shall ascertain from the call of the national convention of each political party the number of delegates and alternate delegates to which Illinois will be entitled at the respective national nominating conventions. The Secretary of State shall report the number of delegates and alternate delegates to which Illinois will be entitled at the respective national nominating conventions to the State Board of Elections convened as aforesaid to be utilized by the State Board of Elections in calculating the number of delegates and alternates to be elected from each congressional district in the State at large or State convention, as the case may be.
    Alternative A: The State Board of Elections shall allocate the number of delegates and alternate delegates to which the State is entitled among the congressional districts in the State.
    1. Of the number of delegates to which the State is entitled, 10, plus those remaining unallocated under paragraph 2, shall be delegates at large. The State central committee of the appropriate political party shall determine whether the delegates at large shall be (a) elected in the primary from the State at large, (b) selected by the State convention, or (c) chosen by a combination of these 2 methods. If the State central committee determines that all or a specified number of the delegates at large shall be elected in the primary, the committee shall file with the Board a report of such determination at the same time it certifies the alternative it wishes to use in allocating its delegates.
    2. All delegates other than the delegates at large shall be elected from the congressional districts. Two delegates shall be allocated from this number to each district. After reserving 10 delegates to be delegates at large and allocating 2 delegates to each district, the Board shall allocate the remaining delegates to the congressional districts pursuant to the following formula:
        (a) For each district, the number of remaining
    
delegates shall be multiplied by a fraction, the numerator of which is the vote cast in the congressional district for the party's nominee in the last Presidential election, and the denominator of which is the vote cast in the State for the party's nominee in the last Presidential election.
        (b) The Board shall first allocate to each district a
    
number of delegates equal to the whole number in the product resulting from the multiplication procedure in subparagraph (a).
        (c) The Board shall then allocate any remaining
    
delegates, one to each district, in the order of the largest fractional remainder in the product resulting from the multiplication procedure in subparagraph (a), omitting those districts for which that product is less than 1.875.
        (d) The Board shall then allocate any remaining
    
delegates, one to each district, in the order of the largest fractional remainder in the product resulting from the multiplication procedure in subparagraph (a), among those districts for which that product is at least one but less than 1.875.
        (e) Any delegates remaining unallocated shall be
    
delegates at large and shall be selected as determined by the State central committee under paragraph 1 of this Alternative A.
    3. The alternate delegates at large shall be allocated in the same manner as the delegates at large. The alternate delegates other than the alternate delegates at large shall be allocated in the same manner as the delegates other than the delegates at large.
    Alternative B: the chair of the State central committee shall file with the State Board of Elections a statement of the number of delegates and alternate delegates to which the State is entitled and the number of such delegates and alternate delegates to be elected from congressional districts. The State Board of Elections shall allocate such number of delegates and alternate delegates, as the case may be, among the congressional districts in the State for election from the congressional districts.
    The Board shall utilize the sum of 1/3 of each of the following formulae to determine the number of delegates and alternate delegates, as the case may be, to be elected from each congressional district:
    (1) Formula 1 shall be determined by multiplying paragraphs (a), (b), and (c) together as follows:
        (a) The fraction derived by dividing the population
    
of the district by the population of the State and adding to that fraction the following: 1/2 of the fraction calculated by dividing the total district vote for the party's candidate in the most recent presidential election by the total statewide vote for that candidate in that election, plus 1/2 of the fraction calculated by dividing the total district vote for the party's candidate in the second most recent Presidential election by the total statewide vote for that candidate in that election;
        (b) 1/2;
        (c) The number of delegates or alternate delegates,
    
as the case may be, to which the State is entitled at the party's national nominating convention.
    (2) Formula 2 shall be determined by multiplying paragraphs (a), (b), and (c) together as follows:
        (a) The fraction calculated by dividing the total
    
numbers of votes in the district for the party's candidate in the most recent Gubernatorial election by the total statewide vote for that candidate in that election, plus, the fraction calculated by dividing the total district vote for the party's candidate in the most recent presidential election by the total statewide vote for that candidate in that election;
        (b) 1/2;
        (c) The number of delegates or alternate delegates,
    
as the case may be, to which the State is entitled at the party's national nominating convention.
    (3) Formula 3 shall be determined by multiplying paragraphs (a), (b), and (c) together as follows:
        (a) 1/2 of the fraction calculated by dividing the
    
total district vote for the party's candidate in the most recent presidential election by the total statewide vote for that candidate in that election, plus 1/2 of the fraction calculated by dividing the total district vote for the party's candidate in the second most recent presidential election by the total statewide vote for that candidate in that election. This sum shall be added to the fraction calculated by dividing the total voter registration of the party in the district by the total voter registration of the party in the State as of January 1 of the year prior to the year in which the national nominating convention is held;
        (b) 1/2;
        (c) The number of delegates or alternate delegates,
    
as the case may be, to which the State is entitled at the party's national nominating convention.
    Fractional numbers of delegates and alternate delegates shall be rounded upward in rank order to the next whole number, largest fraction first, until the total number of delegates and alternate delegates, respectively, to be so chosen have been allocated.
    The remainder of the delegates and alternate delegates shall be selected as determined by the State central committee of the party and shall be certified to the State Board of Elections by the chair of the State central committee.
    Notwithstanding anything to the contrary contained herein, with respect to all aspects of the selection of delegates and alternate delegates to a national nominating convention under Alternative B, this Code shall be superseded by the delegate selection rules and policies of the national political party including, but not limited to, the development of an affirmative action plan.
(Source: P.A. 100-1027, eff. 1-1-19.)