225 ILCS 640/8
Each livestock auction market shall, except on days when all livestock is consigned direct for immediate slaughter and except for sales restricted to equidae, be under the direct supervision of an accredited veterinarian approved by the Department and each licensed livestock auction market designated as a marketing center shall, except on days when all livestock is consigned direct for immediate slaughter and except for sales restricted to equidae, be under the direct supervision of an accredited veterinarian approved by the Department. Except as otherwise provided in this Act and by regulations, no livestock known to be infected with or known to have been exposed to any contagious, infectious, or communicable animal disease or infestation shall be consigned to or sold through any livestock auction market. The veterinarian shall examine or inspect all livestock that is offered for sale and shall prohibit the sale of any animals which in his opinion are diseased or which are likely to be carriers of disease, and shall quarantine such animals when necessary. The veterinarian shall also issue or cause to be issued all necessary quarantines for livestock sold through such markets. The name and address of the purchaser of any livestock sold under or subject to quarantine, together with the description and number of head of the livestock shall be reported to and filed with the Department within 48 hours from date of sale. The veterinarian shall supervise the cleaning and disinfecting of the yards and pens following each sale or at such other times as may be necessary. Except as otherwise provided in this Act, no female cattle or bulls more than 6 months of age shall be sold through a livestock auction market, except for slaughter, unless such cattle (a) are in compliance with the provisions of "An Act in relation to the eradication of bovine brucellosis among domestic cattle", approved July 12, 1939, as amended or (b) are female cattle of the beef breeds over 6 and under 18 months of age released on permit subject to the livestock quarantine regulations of the Department for feeding or grazing purposes only consigned direct from the farm to the livestock auction market or shipped direct to the livestock auction market from other states, livestock auction markets, or marketing centers within the State in accordance with Illinois statutory requirements to be sold through the livestock auction market without test for brucellosis or tuberculosis.
Bulls over 18 months of age, springer heifers and cows, or heifers and cows with calves, are classed as breeding cattle and as such shall comply with the requirements governing breeding cattle.
Calves under 3 months of age of all breeds, not with their dams, may enter the State of Illinois without test for tuberculosis if they are consigned to a licensed livestock auction market to be sold for immediate slaughter.
Under the provisions of this Act, the Department of Agriculture is authorized to make rules and regulations permitting or requiring the sale through livestock auction markets, for immediate slaughter only, of any cattle which upon being tested for brucellosis react to an official test for brucellosis.
Livestock auction markets handling livestock during inclement weather shall be equipped with facilities for housing the livestock during such inclement weather. If livestock is held on the premises for more than 10 hours, facilities for feeding and watering the livestock shall be provided. The yards, pens, and premises where livestock is held or handled shall be regularly cleaned and disinfected for the purpose of preventing infectious, contagious, and communicable animal diseases.
In case any livestock auction market shall sell livestock by weight, the scales upon which such livestock is weighed shall be regularly inspected and tested.
225 ILCS 640/8