(105 ILCS 5/28-1) (from Ch. 122, par. 28-1)
    Sec. 28-1. Copies and prices filed - Bond. No person shall offer any school instructional materials for adoption, sale or exchange in the State until he has complied with the following conditions:
    1. He shall file with the State Board of Education, annually, by July 15, a sworn statement of the usual list price, the lowest net wholesale price, and the lowest net exchange price at which the material is sold or exchanged for old material on the same subject of like grade and kind but of a different series taken in part payment thereof.
    2. He shall file with the State Board of Education a bond payable to the People of the State of Illinois with a surety company authorized to do business in the State of Illinois as surety thereon, in a penal sum to be determined by the State Board of Education, not less than $2000 nor more than $10,000 conditioned as follows:
    (a) That he will furnish annually any of the materials listed in any annual statement filed by him to any school district and any school corporation in this State at the lowest net prices contained in the statements and that he will maintain said prices uniformly throughout the State.
    (b) That he will reduce such net prices in Illinois whenever they are reduced elsewhere in the United States, and that he will file with the State Board of Education a sworn statement of reductions made elsewhere, so that at no time shall any instructional material so filed and listed by him be sold in this State at a higher net price than is received for such material elsewhere in the United States.
    (c) He shall not enter into any understanding, agreement or combination to control the prices or to restrict competition in the sale of instructional materials.
(Source: P.A. 81-1508.)