(110 ILCS 805/7-23) (from Ch. 122, par. 107-23)
    Sec. 7-23. The chairman of the board, with the approval of the board, may designate one or more persons to have authority, when so directed by the chairman to affix the signature of the chairman to any warrant, certificate, contract or any other written instrument, which by law is required to be signed by the chairman of the board. When the signature of the chairman of the board is so affixed to a written instrument, it is as binding upon the board as if signed personally by its chairman. Whenever the chairman of the board desires to designate a person to affix the signature of the chairman to any warrant, certificate, contract or any other written instrument, he shall send a written notice to the board containing the name of the person he has selected and a designation of the instruments that person shall have authority to sign. Attached to the notice shall be the written signature of the chairman of the board, executed by the person so designated, with the signature of the person so designated underneath. The notice shall be filed with the secretary, presented at the next meeting of the board for its approval and entered in the proceedings of that meeting.
(Source: P.A. 76-1505.)