I believe Chicago Building Code doesn't reference any other building code, but the sections in the code are arranged in an approach similar to the model building code developed by ICC. Many in the industry believe the Chicago Building Code to be outdated and inconvenient to use per today's standards.
I believe you can look at the code online. And I think strucguy is correct, it doesn't appear to adopt other model codes.
Outdated? Probably. Inconvenient? Who wouldn't like using that code?? If your building is less than 200' tall; your MWFRS wind loads are 20psf, your C&C loads are 25psf with 30psf at the corners. ASCE 7-10 would take you six or eight chapters to get that information.