505 ILCS 90/22.04
The Director, upon finding injurious insects or other pests or plant diseases present in a nursery or in nursery stock, or a not viable nursery stock as set forth in Section 29, may issue a stop-sale order against such plants. Plants placed on stop-sale shall be conspicuously tagged, either individually or in blocks, provided that such infested stock is clearly separable, if possible, from noninfested stock, and that such physical separation is effected and maintained. The stop-sale order shall contain the following:
Stop-sale tags shall not be removed from nursery stock until such stock meets the requirements of this Act and removal is authorized by written permission of the Director or upon disposal of the infested stock in a manner authorized by the Director. The Director may restrict or restrain the transportation of any nursery stock which has been placed on stop-sale, or may prescribe conditions under which such nursery stock may be transported. It is unlawful to sell, install or otherwise distribute nursery stock which has been placed on stop-sale.
505 ILCS 90/22.04