Ill. Admin. Code tit. 35, § 501.378
Narrow, permanent strip of perennial vegetation established at the edge of a field that is a minimum of 15 feet wide. The vegetative fence row slows water runoff and enhances water infiltration, reducing the risk of pollutants leaving the field.
(Source: Added at 38 Ill. Reg. 17661, effective August 11, 2014)