225 ILCS 650/9
The Director shall, wherever slaughter operations are conducted at an establishment, cause antemortem inspection to be made by inspectors where and to the extent it determines necessary regarding all animals and poultry intended for human food. The owner or operator of any such establishment shall furnish satisfactory facilities and assistance as may be required by the Director to facilitate such antemortem inspection. Facilities shall also be furnished for holding animals or poultry for further clinical examination. Such animals or poultry held for further inspection shall be identified as "Illinois Suspect" in a manner determined by the Director. Such reinspection shall be conducted by a licensed and approved veterinarian and if a finding is made that the animals or poultry show no symptoms of disease or other abnormal conditions, the animals or poultry may be released for slaughter. Upon finding symptoms of disease or other abnormal conditions which would render the animals or poultry unfit for human food, the animals or poultry shall be tagged or permanently identified as "Illinois Inspected and Condemned" and unfit for human food and shall be disposed of in a manner as prescribed by the Director. Any person who slaughters for human food such condemned animals or poultry is guilty of a Class 4 felony. No owner or person shall be required to hold animals or poultry for a longer period than 72 hours.
225 ILCS 650/9