- Rules 199 to 206 shall apply to works or parts thereof in which.I. Caustic pots are used ; orII. Chlorate or bleaching powder is manufactured ; orIII(a) Gas tar or coal tar is distilled or is used in any process of chemical manufacture ; or(b)A nitro or amino process is carried on ; or(c)A chrome process is carried on; orIV. Crude shale oil is refined or processes incidental thereto are carried on ; orV. Nitric acid is used in the manufacture of nitro compounds;VI. The evaporation of brine in open pans and the stoving of salt are carried on ; andVI. The manufacture or recovery of hydro-fluoric acid or any of its salt are carried on orVIII. Work at a furnace where the treatment of zinc ores is carried on ,'IX. Insecticides mentioned in item 10 of Schedule I in rule 198, are manufactures mixed, blended or packed
