1. a) All glazing in the rear of a school bus, including the door, shall be the fixed type.

2. b) Laminated safety glass is optional. All applicable provisions of the FMVSS 205 (49 CFR 205) apply to the optional laminated safety glass and also to any plastic materials used in multiple-glazed unit, including meeting the pertinent tests indicated below, that are specified in ANSI Standard Z26.1-1996 or Z26.1a-1996 and are grouped in Table No. 1 of that Standard. Glazing shall be identified as shown below.

   Glazing installed in:	Shall meet tests grouped in Z26.1 Table No. 1 under:	Shall bear one of the following identification markings:
   Windshield	Item 1, either laminated glass or multiple glazed unit	AS 1 Glass
   Window or door forward of rearmost location of driver's seat back		AS 1 Glass or AS 2 Glass
   All Other locations		AS 1 Glass, AS 2 Glass or AS 3 Glass

3. c) In addition, any exposed plastic layer of a multiple glazed unit shall be identified in conformance with the FMVSS 205 (49 CFR 571.205).

4. d) All glazing shall be installed so the identification markings are legible.

   AGENCY NOTE: See Section 442.310, Window Openings, for window operation requirements.

(Source: Amended at 26 Ill. Reg. 3255, effective February 19, 2002)