430 ILCS 60/2.2
"Hazardous locations" means those installations, glazed or to be glazed in commercial and public buildings, known as framed or unframed glass entrance doors; and those installations, glazed or to be glazed in residential buildings and other structures used as dwellings, commercial buildings, and public buildings, known as sliding glass doors, storm doors, shower doors, bathtub enclosures and fixed glazed panels adjacent to entrance and exit doors which because of their location present a barrier in the normal path traveled by persons going into or out of these buildings, and because of their size and design may be mistaken as means of ingress or egress; and any other installation, glazed or to be glazed, where the use of other than safety glazing materials would constitute an unreasonable hazard as the Department of Labor may determine after notice and hearings as required by Sections 6 and 6.1 of this Act. Whether the glazing in such doors, panels, enclosures and other installations is transparent has no relevance towards the meaning of "hazardous locations".
430 ILCS 60/2.2