10 ILCS 5/4-9
The county clerk shall fully instruct the registration officers and deputy registration officers in their duties. Each registration officer and deputy registration officer shall receipt to the county clerk for all blank registration record cards issued to him, specifying therein the number of the blanks received by him, and each registration officer and deputy registration officer shall be charged with such blanks until he returns them to the county clerk. If for any cause a blank registration record card is mutilated or rendered unfit for use in making it out, or if a mistake thereon has been made, such blank shall not be destroyed, but the word "mutilated" shall be written across the face of such card, and the card shall be returned to the county clerk and be preserved in the same manner and for the same length of time as mutilated ballots. When each 1969 and 1970 precinct re-registration has been completed, each registration officer shall certify the registration records in substantially the following form:
"We, the undersigned registration officers or deputy registration officers in the County of .... in the State of Illinois, do swear (or affirm) that at the registration of electors on (insert date) there was registered by us in the said election precinct the names which appear on the registration records, and that the number of voters registered and qualified was and is the number of .... ...................... ...................... ...................... Registration officers. Date ................"
After completion of each 1969 and 1970 precinct re-registration each of the officers of registration for such precinct shall place all registration cards received by him, regardless of whether such cards have been unused, filled out, executed or mutilated, in an envelope to be provided for that purpose by the county clerk and shall seal such envelope with an official wax impression seal and sign his name across the face of such envelope. The judge of registration for such precinct shall include in the envelope sealed by him the certification of the registration records hereinabove required. The judge of registration for such precinct shall within 24 hours after the close of re-registration make personal delivery of all envelopes containing the re-registration cards for such precinct to the county clerk.
Other precinct registrations shall be certified and returned in the same manner.
10 ILCS 5/4-9