510 ILCS 30/6.71

Except as otherwise provided in this Act, no female bison or bulls more than 6 months of age shall be loaned, leased, traded or sold in this State, except for slaughter, unless such bison either:

1. Have been tested for brucellosis and found negative within 60 days prior to the date of such transaction and are accompanied by either a certificate of health or an official test chart showing such test and the result thereof, which test shall be recognized for unlimited change of ownership or premises within the 60-day period; or

2. Are females 24 months of age or under which were officially vaccinated against brucellosis with a licensed vaccine, are positively identified, and are accompanied by an official certificate of vaccination; or

3. Are in a certified brucellosis-free herd at the time of transaction.