"Electromagnetic interference/radio frequency interference coatings" or "EMI/RFI coatings" means:
Prior to May 1, 2012, coatings used on business machine plastic housings to attenuate electromagnetic and radio frequency interference signals that would otherwise pass through the plastic housing;
On and after May 1, 2012, coatings used on electrical or electronic equipment to provide shielding against electromagnetic interference, radio frequency interference, or static discharge.
Ill. Admin. Code tit. 35, § 211.1883
Section 211.1880 renumbered to Section 211.1883 and amended at 34 Ill. Reg. 14119, effective September 14, 2010