The hoppers of all fillers shall be covered but the cover may have sight ports. If necessary, the hopper may have an agitator to prevent buildup on side wall. The filler valves and head shall be kept in good repair, capable of accurate measurements.
Ill. Admin. Code tit. 77, § 785.840
Adopted at 11 Ill. Reg. 2356, effective February 1, 1987