105 ILCS 5/19-5

All bonds issued under this Act, except bonds issued by school districts having a population of more than 500,000 inhabitants, before being issued, negotiated and sold, shall be registered, numbered and countersigned by the treasurer who receives the taxes of the district. The registration shall be made in a book in which shall be entered the record of the election authorizing the directors or the board of education to borrow money and a description of the bonds issued, including the number, date, to whom issued, amount, rate of interest and when due.