(1)The general illumination over those interior parts of a factory where persons are regularly employed shall be not less than [1.80 metre] [Substituted by Notification No. 4(A) 3-81-LAB-XVI, dated 28-5-1981.] candles measured in the horizontal plane at a level of [1.80 metre] [Substituted by Notification No. 4(A) 3-81-LAB-XVI, dated 28-5-1981.] above the floor :Provided that in any such parts in which the mounting height of the light source for general illumination necessarily exceeds 25 feet measured from the floor of where the structure of the room or the position or construction of the fixed machinery or plant prevents the uniform attainment of this standard, the general illumination at the said level shall be not less than [0.60 metre] [Substituted by Notification No. 4(A) 3-81-LAB-XVI, dated 28-5-1981.] candle, and where work is actually being done, the illumination shall be not less than 3-foot candles.
