10 ILCS 5/20-5
The election authority shall fold the ballot or ballots in the manner specified by the statute for folding ballots prior to their deposit in the ballot box and shall enclose such ballot in an envelope unsealed to be furnished by it, which envelope shall bear upon the face thereof the name, official title and post office address of the election authority, and upon the other side of such envelope there shall be printed a certification in substantially the following form:
"CERTIFICATION
I state that I am a resident/former resident of the ....... precinct of the city/village/township of ............ , (Designation to be made by Election Authority) or of the .... ward in the city of ........... (Designation to be made by Election Authority) residing at ................ in said city/village/township in the county of ........... and State of Illinois; that I am a
I further state that I marked the enclosed ballot in secret.
Under penalties as provided by law pursuant to Article 29 of the Election Code, the undersigned certifies that the statements set forth in this certification are true and correct.
............... (Name)
.....................
(Service Address)
.....................
.....................
..................... "
If the ballot enclosed is to be voted at a primary election, the certification shall designate the name of the political party with which the voter is affiliated.
In addition to the above, the election authority shall provide printed slips giving full instructions regarding the manner of completing the forms and affidavits for registration by mail or the manner of marking and returning the ballot in order that the same may be counted, and shall furnish one of the printed slips to each of the applicants at the same time the registration materials or ballot is delivered to him.
In addition to the above, if a ballot to be provided to an elector pursuant to this Section contains a public question described in subsection (b) of Section 28-6 and the territory concerning which the question is to be submitted is not described on the ballot due to the space limitations of such ballot, the election authority shall provide a printed copy of a notice of the public question, which shall include a description of the territory in the manner required by Section 16-7. The notice shall be furnished to the elector at the same time the ballot is delivered to the elector.
The envelope in which such registration or such ballot is mailed to the voter as well as the envelope in which the registration materials or the ballot is returned by the voter shall have printed across the face thereof two parallel horizontal red bars, each one-quarter inch wide, extending from one side of the envelope to the other side, with an intervening space of one-quarter inch, the top bar to be one and one-quarter inches from the top of the envelope, and with the words "Official Election Balloting Material-VIA AIR MAIL" between the bars. In the upper right corner of such envelope in a box, there shall be printed the words: "U.S. Postage Paid 42 USC 1973 ". All printing on the face of such envelopes shall be in red, including an appropriate inscription or blank in the upper left corner of return address of sender.
The envelope in which the ballot is returned to the election authority may be delivered (i) by mail, postage paid, (ii) in person, by the spouse, parent, child, brother, or sister of the voter, or (iii) by a company engaged in the business of making deliveries of property and licensed as a motor carrier of property by the Illinois Commerce Commission under the Illinois Commercial Transportation Law.
Election authorities transmitting ballots by facsimile or electronic transmission shall, to the extent possible, provide those applicants with the same instructions, certification, and other materials required when sending by mail.
10 ILCS 5/20-5