510 ILCS 30/14
The use of vaccines containing Brucella microorganisms shall be permitted in the manner and upon the conditions hereinafter set forth. Only vaccines produced under license of the Animal and Plant Health Inspection Service of the United States Department of Agriculture or any successor agency for calfhood vaccinations against bovine brucellosis may be used. Such vaccines shall be sold by the distributor only to a licensed veterinarian, and shall be administered only by a licensed veterinarian or a veterinarian in the employ of the Animal and Plant Health Inspection Service of the United States Department of Agriculture or any successor agency. All animals vaccinated shall be positively identified. The Department may by regulation require brucellosis vaccination of female cattle or female bison entering or moving within this State.
The veterinarian vaccinating such animals shall give to the owner an official record identifying such animals and stating that they were vaccinated with a licensed vaccine, giving the date of vaccination, the serial number and name of the manufacturer of such vaccine, and the dosage used.
Animals vaccinated at such age, when accompanied by an official record of vaccination, or any animals that have lost their ear tags but have the official calfhood vaccination tattoo in the ear may move unrestricted, even though they may react to an official test for brucellosis, until they reach the age of 24 months for beef breeds and 20 months for dairy breeds. Upon request, the veterinarian vaccinating any such animal shall test the animal for brucellosis prior to vaccination and shall give the owner an official record showing the result of the test and that the animal was then vaccinated with a licensed vaccine, giving the date of vaccination, the serial number and name of the manufacturer of such vaccine, and the dosage used.
510 ILCS 30/14