515 ILCS 5/1-135

Taking for propagation or maintaining biological balance. The Department and persons authorized by it may take, purchase, or propagate any aquatic life or their eggs for propagation and stocking purposes.

The Department may remove and dispose of any aquatic life from any waters under the jurisdiction of this State to maintain the biological balance of aquatic life as the Department deems proper. The Department is authorized to sell or contract with any person to so remove and dispose of aquatic life upon terms to be approved by the Department.