(10 ILCS 5/6-66) (from Ch. 46, par. 6-66)
    Sec. 6-66. Upon application to vote each registered elector shall sign his name or make his mark as the case may be, on a certificate substantially as follows:
"CERTIFICATE OF REGISTERED VOTER
    City of ................. Ward .... Precinct .... Election ...............(Date).......(Month)...........(Year) Registration Record ....... Checked by ............... Voter's number ....
INSTRUCTION TO VOTERS
    Sign this certificate and hand it to the election officers in charge. After the registration record has been checked, the officer will hand it back to you. Whereupon you shall present it to the officer in charge of the ballots.
    I hereby certify that I am registered from the address below and am qualified to vote.
Signature of voter ................
Residence address ................"
    An individual shall not be required to provide his social security number when applying for a ballot. He shall not be denied a ballot, nor shall his ballot be challenged, solely because of his refusal to provide his social security number. Nothing in this Act prevents an individual from being requested to provide his social security number when the individual applies for a ballot. If, however, the certificate contains a space for the individual's social security number, the following notice shall appear on the certificate, immediately above such space, in bold-face capital letters, in type the size of which equals the largest type on the certificate:
    "THE INDIVIDUAL APPLYING FOR A BALLOT WITH THIS DOCUMENT IS NOT REQUIRED TO DISCLOSE HIS OR HER SOCIAL SECURITY NUMBER. HE OR SHE MAY NOT BE DENIED A BALLOT, NOR SHALL HIS OR HER BALLOT BE CHALLENGED, SOLELY BECAUSE OF HIS OR HER REFUSAL TO PROVIDE HIS OR HER SOCIAL SECURITY NUMBER."
    The applications of each State-wide political party at a primary election shall be separately printed upon paper of uniform quality, texture and size, but the applications of no 2 State-wide political parties shall be of the same color or tint. If the election authority provides computer generated applications with the precinct, ballot style, and voter's name and address preprinted on the application, a single application may be used for State-wide political parties if it contains spaces or check-off boxes to indicate the political party. Such applications may contain spaces or check-off boxes permitting the voter to also request a primary ballot of any political party which is established only within a political subdivision and for which a primary is conducted on the same election day. Such applications shall not entitle the voter to vote in both the primary of a State-wide political party and the primary of a local political party with respect to the offices of the same political subdivision or to vote in the primary of more than one State-wide political party on the same day.
    The judges in charge of the precinct registration files shall compare the signature upon such certificate with the signature on the registration record card as a means of identifying the voter. Unless satisfied by such comparison that the applicant to vote is the identical person who is registered under the same name, the judges shall ask such applicant the questions for identification which appear on the registration card, and if the applicant does not prove to the satisfaction of a majority of the judges of the election precinct that he is the identical person registered under the name in question then the vote of such applicant shall be challenged by a judge of election, and the same procedure followed as provided in this Article and Act for challenged voters.
    In case the elector is unable to sign his name, a judge of election shall check the data on the registration card and shall check the address given, with the registered address, in order to determine whether he is entitled to vote.
    One of the judges of election shall check the certificate of such applicant for a ballot after the registration record has been examined, and shall sign his initials on the certificate in the space provided therefor, and shall enter upon such certificate the number of the voter in the place provided therefor, and make an entry in the voting record space on the registration record, to indicate whether or not the applicant voted. Such judge shall then hand such certificate back to the applicant in case he is permitted to vote, and such applicant shall hand it to the judge of election in charge of the ballots. The certificates of the voters shall be filed in the order in which they are received and shall constitute an official poll record. The terms "poll lists" and "poll books", where used in this Article and Act, shall be construed to apply to such official poll record.
    After each general primary election the board of election commissioners shall indicate by color code or other means next to the name of each registrant on the list of registered voters in each precinct the primary ballot of a political party that the registrant requested at the general primary election. The board of election commissioners, within 60 days after that general primary election, shall provide a copy of this coded list to the chairman of the county central committee of each established political party or to the chairman's duly authorized representative.
    Within 60 days after the effective date of this amendatory Act of 1983, the board of election commissioners shall provide to the chairman of the county central committee of each established political party or to the chairman's duly authorized representative the list of registered voters in each precinct at the time of the general primary election of 1982 and shall indicate on such list by color code or other means next to the name of a registrant the primary ballot of a political party that the registrant requested at the general primary election of 1982.
    The board of election commissioners may charge a fee to reimburse the actual cost of duplicating each copy of a list provided under either of the 2 preceding paragraphs.
    Where an elector makes application to vote by signing and presenting the certificate provided by this Section, and his registration card is not found in the precinct registry of voters, but his name appears as that of a registered voter in such precinct upon the printed precinct register as corrected or revised by the supplemental list, or upon the consolidated list, if any provided by this Article and whose name has not been erased or withdrawn from such register, the printed precinct register as corrected or revised by the supplemental list, or consolidated list, if any, shall be prima facie evidence of the elector's right to vote upon compliance with the provisions hereinafter set forth in this Section. In such event it shall be the duty of one of the judges of election to require an affidavit by such person and 2 voters residing in the precinct before the judges of election that he is the same person whose name appears upon the printed precinct register as corrected or revised by the supplemental list, or consolidated list, if any, and that he resides in the precinct, stating the street and number of his residence, and upon the presentation of such affidavits, a certificate shall be issued to such elector, and upon the presentation of such certificate and affidavits, he shall be entitled to vote. Any elector whose name does not appear as a registered voter on the printed precinct register or supplemental list but who has a certificate issued by the board of election commissioners as provided in Section 6-43 of this Article, shall be entitled to vote upon the presentation of such certificate accompanied by the affidavits of 2 voters residing in the precinct that the elector is the same person described in such certificate and that he resides in the precinct, stating the street and number of his residence. Forms for all affidavits required hereunder shall be supplied by the board of election commissioners. All affidavits made under this paragraph shall be preserved and returned to the board of election commissioners in the manner provided by this Article and Article 18 of this Act. It shall be the duty of the board of election commissioners, within 30 days after such election, to take the steps provided by Section 6-64 of this Article for the execution of new registration affidavits by electors who have voted under the provisions of this paragraph.
    When the board of election commissioners delivers to the judges of election for use at the polls a supplemental or consolidated list of the printed precinct register, it shall give a copy of the supplemental or consolidated list to the chairman of a county central committee of an established political party or to the chairman's duly authorized representative.
    Whenever 2 or more elections occur simultaneously, the election official or officials charged with the duty of providing application certificates may prescribe the form thereof so that a voter is required to execute only one, indicating in which of the elections he desires to vote.
    After the signature has been verified, the judges shall determine in which political subdivisions the voter resides by use of the information contained on the voter registration cards or the separate registration lists or other means approved by the State Board of Elections and prepared and supplied by the election authority. The voter's certificate shall be so marked by the judges as to show the respective ballots which the voter is given.
(Source: P.A. 84-809.)