To prevent the spread of dangerous plants or dangerous plant pests or dangerous disease throughout the State, the Director shall implement a plant or plant pest quarantine when he/she has determined that a dangerous plant or dangerous plant insect or plant disease has been found within the State and presents a significant risk to the production of agricultural or horticultural crops or to other plants which are essential to maintaining the ecosystem and the asthetic enjoyment thereof.

(Source: Amended at 6 Ill. Reg. 3041, effective March 5, 1982)