510 ILCS 50/10

The Department may promulgate and adopt reasonable rules and regulations to prevent the entry into Illinois of any animals which may be contaminated or infected with, or which may have been exposed to, any contaminant or contagious or infectious disease. If the condition so warrants, the Director may request the Governor to issue a proclamation whereby any animals contaminated or diseased or those exposed to disease and any carcasses or portions of carcasses, feed, seed, bedding, equipment or other material capable of conveying contamination or infection will be prohibited from entering Illinois.