If something seems to be missing from local regulations, check FDA 2017. Download City Rules pdf to search content.
Chicago Health Dept Rules and Regulations – Effective February 1, 2019
Chicago Municipal Code– Most food related laws in Titles 4 & 7
This is not a comprehensive list. Many regulations are in Illinios Statutes, such as requirements for Ice Cream.
Illinois Wholesale Food Application – click on “Manufactured Food” link
FSMA – GMP’s – Good Manufacturing Practices Open Part 117