Ill. Admin. Code tit. 92, § 440.405
At the time of the safety test conducted under provisions of Section 13-109 of the Code [625 ILCS 5/13-109], and when delivered to the purchaser, the body of each Type I School Bus shall conform to the requirements stated or referred to in this Subpart. Some chassis requirements also applicable to the body are stated or referred to herein.
(Source: Amended at 22 Ill. Reg. 19354, effective October 15, 1998)