92 Ill. Adm. Code 442.213
Bumper, Rear
Section 442
Section 442.213 Bumper, Rear
a) The entire rear bumper must be of metal construction unless an
energy absorbing bumper is used.
b) The rear bumper must meet chassis or body manufacturer's
standards.
c) The rear bumper shall be shielded between the body and the
bumper to prevent hitching or "riding on."
AGENCY NOTE: See Section 442.420 for front bumper
requirements.