Each light of safety glazing material manufactured, distributed, imported, or sold for use in hazardous locations or installed in such a location within the Commonwealth of Pennsylvania, shall be permanently labeled by such means as etching, sandblasting, firing of ceramic material on the safety glazing material, or by other suitable means. The label shall identify the labeler, whether manufacturer, fabricator or installer, and the nominal thickness and the type of safety glazing material and the fact that said material meets the test requirements of USA Standard Z-97.1-1966 and such further requirements as may be adopted by the Department of Labor and Industry. The label must be legible and visible after installation.