510 ILCS 30/3
All owners of dairy or breeding cattle within the State of Illinois shall submit their cattle for an official test for the detection of brucellosis upon request by the Department, and shall provide the necessary facilities for making tests and render such assistance as may be required by the Department. The direct expense of making such tests shall be paid by the Department.
The Department may use or authorize the ring test to detect the herds in which brucellosis exists. All herds producing milk or cream which react to the ring test shall be given an official test in accordance with rules and regulations of the Department. If the tests provided for in this Act disclose that any animal or animals in such herd are infected with brucellosis and it appears that the public interest would best be served by their destruction, the owner may be partially indemnified for the loss sustained, unless otherwise required by the provisions of Section 4 of this Act.
510 ILCS 30/3