92 Ill. Adm. Code 442.240
Glazing Materials
Section 442
Section 442.240 Glazing
Materials
a) All glazing in the rear of a school bus, including the door,
shall be the fixed type.
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
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).
d) All glazing shall be installed so the identification markings
are legible.
AGENCY NOTE: See Section 442.310, Window Openings, for
window operation requirements.