Iowa Window Tinting Standards - Iowa Department Of Transportation

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IOWA WINDOW TINTING STANDARDS
The windshield and front
The rear window and rear
passenger/driver windows
passenger windows can
are required to admit no
have any amount of tint
less than 70% of the light
Window Tint FAQS
Iowa law prohibits a person from operating a motor
vehicle that is equipped with a front windshield or a side
Question: I was recently diagnosed with a light
window to the immediate right or left of the driver (front
sensitive condition. Can I obtain a medical exemption
side window) which does not meet a standard of
from the 70% standard?
transparency of 70% light transmittance. Effective July 4,
Answer: Medical exemptions may not be granted
2012, no exemption may be granted from the 70%
after July 4, 2012.
standard.
Medical exemptions signed by a physician, chiropractor,
or optometrist prior to July 4, 2012, remain valid subject
Question: I have a letter signed by my doctor prior to
to the following conditions: A motor vehicle fitted with a
July 4, 2012, indicating a medical necessity for
darkened windows. Will law enforcement recognize
front windshield or a front side window with less than 70
this letter?
percent but not less than 35 percent light transmittance
before July 4, 2012, may continue to be operated with a
Answer: No. Your tinted windows may admit as little
front windshield or a front side window with less than 70
as 35% of the light but only if they were darkened for
percent but not less than 35 percent light transmittance
medical reasons prior to July 4, 2012, and DOT form
on or after July 4, 2012, so long as the vehicle continues
#432020, signed by your physician prior to July 4,
2012, is carried in the vehicle to which the exemption
to be used for the transport of a passenger or operator
applies.
who obtained Form 432020, which documented a
medical need for such reduced transparency, and was
signed by the person’s physician before July 4, 2012.
Question: I lost my medical exemption form #432020
Form 432020 must be carried at all times in the vehicle
which was signed prior to July 4, 2012, and was for
to which the exemption applies. At such time as the
my vehicle which was equipped with darkened
vehicle is no longer used for the transport of the
windows prior to July 4, 2012. Can I obtain a
passenger or operator who is the subject of Form
replacement?
432020, the exemption expires and may not be renewed.
Answer: Yes. The Office of Vehicle and Motor Carrier
The owner of the vehicle to which the exemption applied
Services will provide replacement forms to your
must return the vehicle to conformance with the
physician, chiropractor, or optometrist upon request.
minimum standard of transparency within 60 days of
expiration of the exemption.
Questions may be directed to the Office of Vehicle and Motor Carrier Services at 515-237-3110 or via email to
vehser@dot.state.ia.us

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