520 ILCS 5/1.12

The Department shall use the most modern conservation methods to manage wildlife on State controlled lands or waters for propagation or breeding wildlife. The Department may cooperate with any person desirous of managing wildlife on private lands or waters by (a) furnishing trees, shrubs, seeds or other materials where deemed necessary or desirable and (b) providing labor, equipment and technical supervision to plan and assist the landowner in wildlife habitat development.