Senate Bill 2228 Signed into Law by Governor Rauner Amends Illinois DUI Law as of July 29, 2016

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Effective July 29, 2016, New Illinois DUI Law

Effective July 29, 2016, Illinois has amended its DUI law to allow for the presence of small amounts of marijuana in a person’s system. Under subsection (a)(6) of  625 ILCS 5/11-501 of the previous law, a person could not be in actual physical control of a vehicle in the State of Illinois if that person had any amount of cannabis in the person’s breath, blood, or urine. Under the new law, SB2228, 625 ILCS 5/11-501, Cannabis is excluded from subsection (a)(6) and a subsection (a)(7) has been amended as follows:

(7) the person has, within 2 hours of driving or being in actual physical control of a vehicle, a tetrahydrocannabinol concentration in the person’s whole blood or other bodily substance as defined in paragraph 6 of subsection (a) of Section 11-501.2 of this Code….


Paragraph 6 of subsection (a) of Section 11-501.2 defines the amount of cannabis allowed as follows:

6. Tetrahydrocannabinol concentration means either 5 nanograms or more of delta-9-tetrahydrocannabinol per milliliter of whole blood or 10 nanograms or more of delta-9-tetrahydrocannabinol per milliliter of other bodily substance.


The text of the SB2228 as it amends  625 ILCS 5/11-501 can be seen by following this link.

The new law sets up a measureable standard that, regardless of your ability to operate a motor vehicle, if this level of THC is present within 2 hours of having driven or being in control of a motor vehicle, you are guilty of a DUI. This is a welcome change from the previous law which created a situation where a person could be found guilty of a DUI for trace amounts of THC in their blood up to 30 days following the smoking of cannabis. Still to be worked out will be the mechanics of measuring THC within an acceptable degree of scientific certainty. Currently, there are no labs in Illinois which measure THC in nanograms per milliliter and there is still debate within the scientific community as to the correlation between THC measurement and level of impairment.

This new area of the law is complex, and the assistance of an experienced criminal defense attorney is necessary to ensure the police follow the law and respect the rights and privileges the legislature has given to those who use or dispense medical cannabis. If you have been charged with DUI or possession of medical cannabis in a vehicle and you use or dispense medical cannabis, or if you are unsure of what you may and may not do under these new laws, contact criminal defense attorney JohnPaul Ivec at Ivec Law, P.C. today at (815) 439-9909 for a free consultation; or e-mail at