10 ILCS 5/6-50
The office of the board of election commissioners shall be open during ordinary business hours of each week day, from 9 a.m. to 12 o'clock noon on the last four Saturdays immediately preceding the end of the period of registration preceding each election, and such other days and such other times as the board may direct. There shall be no registration at the office of the board of election commissioners in cities, villages and incorporated towns of fewer than 200,000 inhabitants during the 27 days preceding any primary, regular or special election at which the cards provided for in this article are used, or until the second day following such primary, regular or special election. In cities, villages and incorporated towns of 200,000 or more inhabitants, there shall be no registration of voters at the office of the board of election commissioners during the 35 days immediately preceding any election; provided, however, where no precinct registration is being conducted prior to any election then registration may be taken in the office of the board up to and including the 28th day prior to such election. In any election called for the submission of the revision or alteration of, or the amendments to the Constitution, submitted by a Constitutional Convention, the final day for registration at the office of the election authority charged with the printing of the ballot of this election shall be the 15th day prior to the date of election.
The Board of Election Commissioners shall appoint one or more registration teams, each consisting of one member from each of the 2 leading political parties, for the purpose of accepting the registration of any voter who files an affidavit, within the period for taking registrations provided for in this Article, that he is physically unable to appear at the office of the Board or at any appointed place of registration. On the day or days when a precinct registration is being conducted such teams shall consist of one member from each of the 2 leading political parties who are serving on the precinct registration board. Each team so designated shall visit each person with a disability and shall accept the registration of such person the same as if he had applied for registration in person.
The office of the board of election commissioners may be designated as a place of registration under Section 6-51 of this Article and, if so designated, may also be open for purposes of registration on such day or days as may be specified by the board of election commissioners under the provisions of that Section.
10 ILCS 5/6-50