"Stain" means any color coat that is applied in single or multiple layers directly to a wood substrate. The term includes non-grainraising stains, equalizer stains, sap stains, body stains, no-wipe stains, penetrating stains, and toners.

Source. (See Revision Note at chapter heading for Env-A 1200) #9933, eff 6-1-11; ss by #12899, eff 10-17-19