Originally Posted by Illinois House Bill #4327

Synopsis As Introduced
Amends the Illinois Vehicle Code. Provides that a person may not install or repair any sign, poster, window application, reflective material, nonreflective material, or tinted film upon the front windshield, sidewings or side windows immediately adjacent to each side of the driver. Provides that a first violation is a petty offense with a fine between $50 and $500, and a second or subsequent offense is a Class C misdemeanor with a fine between $100 and $500. Provides that an installer may install window treatment for who is legally permitted, due to medical reasons, to drive with window treatment that would otherwise be !llegal and provides that the installer must obtain and store a copy of a doctor's certificate or letter from the person with medical condition in the installer's permanent records. Provides that the Secretary of State shall provide a notice of the requirements of a provision prohibiting driving a motor vehicle with any sign, poster, window application, reflective material, nonreflective material, or tinted film upon the front windshield, sidewings or side windows immediately adjacent to each side of the driver, unless an exception applies, to a new resident applying for vehicle registration.

Originally Posted by HB3325

Paragraph 'a'
No person shall drive a motor vehicle with any sign,
poster, window application, reflective material, nonreflective
material or tinted film upon the front windshield, sidewings or
side windows immediately adjacent to each side of the driver,
except as provided in this subsection and subsections (a-5),
(a-7), and (a-9) of this Section.

(a-5)
A nonreflective tinted film that does not allow less
than 50% light transmittance, with a 5% variance observed by
any law enforcement official metering the light transmittance,
may be used on the side windows immediately adjacent to each
side of the driver. This subsection does not apply to the front
windshield. This subsection does not apply to any motor
vehicle, except as provided for in subsection (a-9) of this
Section, that has one or more windows to the rear of the
driver's seat treated in a manner described by subsection (b)
of this Section that allows less than 30% light transmittance.

(a-7)
A nonreflective tinted film that does not allow less
than 35% light transmittance, with a 5% variance observed by
any law enforcement official metering the light transmittance,
may be used on the side windows immediately adjacent to each
side of the driver. This subsection does not apply to the front
windshield. This subsection does not apply to any motor vehicle
that has one or more windows to the rear of the driver's seat
treated in a manner described by subsection (b) of this Section
that allows less than 35% light transmittance.

(a-9)
A nonreflective tinted film that does not allow less
than 50% light transmittance, with a 5% variance observed by
any law enforcement official metering the light transmittance,
may be used on the side windows immediately adjacent to each
side of the driver in any multipurpose passenger vehicle, as
defined by Section 1-148.3b of this Code. This Section does not
apply to any multipurpose passenger vehicle which has tinting
other than the tinting originally applied by the manufacturer.

Paragraph 'b'
Nothing contained in this Section shall prohibit the
use of nonreflective, smoked or tinted glass, nonreflective
film, perforated window screen or other decorative window
application on windows to the rear of the driver's seat, except
that any motor vehicle with a window to the rear of the
driver's seat treated in this manner shall be equipped with a
side mirror on each side of the motor vehicle which are in
conformance with Section 12-502.

Paragraph 'g'
Paragraph (a) of this Section shall not apply to any
motor vehicle with a window treatment, including but not
limited to a window application, reflective material,
nonreflective material, or tinted film, applied or affixed to a
motor vehicle that:
(1) is owned and operated by a person afflicted with or
suffering from a medical illness, ailment, or disease,
including but not limited to systemic or discoid lupus
erythematosus, disseminated superficial actinic
porokeratosis, or albinism, which would require that
person to be shielded from the direct rays of the sun; or
(2) is used in transporting a person when the person
resides at the same address as the registered owner of the
vehicle and the person is afflicted with or suffering from
a medical illness, ailment or disease which would require
the person to be shielded from the direct rays of the sun,
including but not limited to systemic or discoid lupus
erythematosus, disseminated superficial actinic
porokeratosis, or albinism.

Originally Posted by burstaneurysm

It passed the house. It'll go to the state senate when they next meet, on April 21st. It's got quite a few backers (including sponsors from the IL State Police).

I'd be more than happy with 35% all around. The back glass sits at approximately 33%, so pop 35% on the front and call it a day.

I'd expect a few alterations to be made when it goes to the senate... then, of course, Quinn would need to approve it.