65 ILCS 5/11-31.1-4
When a building inspector finds a code violation while inspecting a structure, he shall note the violation on a multiple copy violation notice and report form, indicating the name and address of the structure owner, a citation to the specific code provision or provisions alleged to have been violated, a description of the circumstances present that constitute the alleged violation , the date and time the violation was observed, the names of witnesses to the violation, and the address of the structure where the violation is observed.
The violation report form shall be forwarded by the building inspector to the Code Hearing Department where a Docket number shall be stamped on all copies of the report, and a hearing date noted in the blank spaces provided for that purpose on the form. The hearing date shall not be less than 30 nor more than 40 days after the violation is reported by the building inspector.
One copy of the violation report form shall be maintained in the files of the Code Hearing Department and shall be part of the record of hearing, one copy of the report form shall be returned to the building inspector so that he may prepare evidence of the code violation for presentation at the hearing on the date indicated, and one copy of the report form shall be served by first class mail on the owner of the structure, along with a summons commanding the owner to appear at the hearing. If the municipality in which the structure is situated has an ordinance requiring property owners to register with the municipality, service may be made on the owner by mailing the report and summons to the owner's address registered with the municipality. If the name of the owner of the structure cannot be ascertained or if service on the owner cannot be made by mail, service may be made on the owner by posting or nailing a copy of the violation report form on the front door of the structure where the violation is found, not less than 20 days before the hearing is scheduled.
65 ILCS 5/11-31.1-4