Hello

I am new to this forum, and I am looking for some help.
I am a homeowner and I recently submitted some plans into my local building department for review. The project entails a basement bathroom where I would like to use the Saniflo Sanigrind sewage waste pump. The building department says that the unit is not approved for use in the state of Illinois. However, I have read on the internet that others from Illinois have installed them. Saniflo also has dealers in the state of Illinois, and a Saniflo article of an installer from Illinois who highly recommends this product. My question is, does the Illinois Plumbing Code state which products are acceptable/legal, and where can I find this information; in order to select the required/legal waste pump system.

Thanks