Missouri Revised Statutes Title XI. Education and Libraries § 170.005. Eye protection required, when

(1) Vocational, technical, industrial arts, chemical, or chemical-physical shops or laboratories involving exposure to the following: Hot molten metals, or other molten materials; milling, sawing, turning, shaping, cutting, grinding or stamping of any solid materials; heat treatment, tempering, or kiln firing of any metal or other materials; gas or electric arc welding, or other forms of welding processes; repair or servicing of any vehicle; caustic or explosive materials;

(2) Chemical, physical, or combined chemical-physical laboratories involving caustic or explosive materials, hot liquids or solids, injurious radiations or other hazards not enumerated.