Here's a link to a document updating police on regulations (PDF):
http://www.cyberdriveillinois.com/departments/police/lawupdate0910.pdf
Note that in the index of this document, low speed
electric bicycles are listed, but not low speed
gas bicycles - however, the law includes gas bicycles, and the text of that law is included in the body of this document.
This may explain what happened to me in Yorkville, where the police told me that the law only applied to electric bicycles, and that gas bikes needed plates and insurance and license (oh my). I bet they looked at this paper, looked at the index, found the listing for electric but not gas, and looked no further.
I don't know how they could have missed it, really. It's in the second paragraph. This is from page 17 of the PDF document that you posted the link to. There is also more clarification on page 18 of the PDF:
625 ILCS 5/1-140.10 new, 625 ILCS 5/1-140.15 new, 625
ILCS 5/1-146, 625 ILCS 5/11-1516 new
“Low Speed Electric Bike”
Effective Date: 01/01/10
Public Act: 96-0125 Senate Bill: 0236
Synopsis:
Amends the Illinois Vehicle Code. Defines a low-speed electric bicycle as a 2 or 3-wheeled
device with fully operable pedals and an electric motor of less than 750 watts (one horsepower),
whose maximum speed on a paved level surface, when powered solely by such a motor while
ridden by an operator who weighs 170 pounds, is less than 20 miles per hour. Excludes lowspeed
electric bicycles from the definition of "motor vehicle". Prohibits operation of a low-speed
electric bicycle at a speed greater than 20 miles per hour upon any highway, street, or roadway.
Prohibits operation of a low-speed electric bicycle on a sidewalk. Provides that, except as
otherwise provided, the provisions of the Article of the Code dealing with bicycles also apply to
low-speed electric bicycles.
Adds a definition for a "low-speed gas bicycle" and treats a low-speed gas bicycle the same as a
low-speed electric bicycle in a provision regulating the use of low-speed bicycles and a provision
excluding low-speed bicycles from the definition of a motor vehicle. Removes the requirement
that a person have a valid current Illinois driver's license to operate an electric bicycle.
Warner