(105 ILCS 5/15-20) (from Ch. 122, par. 15-20)
    Sec. 15-20. Books to be kept.
    The county superintendent shall keep 3 books, to be known and designated by the letters A, B, and C. In book A he shall record at length all petitions presented to him for the sale of common school lands, the plats and certificates of valuation made by or under the direction of the trustees of schools, or the township land commissioners, and the affidavits in relation to the same. In book B he shall keep an account of all sales of common school lands, including the date of sale, name of purchaser, description of land sold and the selling price. In book C he shall keep a regular account of all moneys received or paid out; from whom received, on what account, showing whether it is principal or interest, the rate of interest, and a description of the real estate taken as security; if paid out, to whom, when, and on what account, the amount of the sales and the account of each township fund to be kept separate.
(Source: Laws 1961, p. 31.)