"Stencil coat" means:
Prior to May 1, 2012, a coating that is applied over a stencil on a plastic part at a thickness of 1 mil or less of coating solids. Stencil coats are most frequently letters, numbers, or decorative designs;
On and after May 1, 2012, an ink or pigmented coating that is rolled or brushed onto a template or stamp in order to add identifying letters, symbols, and/or numbers.
Ill. Admin. Code tit. 35, § 211.6400
Amended at 34 Ill. Reg. 14119, effective September 14, 2010