This code applies to the design, manufacture, and manner of erection of reflectorized accident prevention and guide signs for use in and about mines. It defines as far as practicable, the types of sign to be used to indicate particular hazards which may cause accidents where such hazards cannot physically be removed, directions to be followed, the location of exits and of safety and fire protection equipment, and information relative to safe practices. The code does not apply to information signs of a general nature, such as plant bulletin boards, safety posters, and the like. It is recommended, however, that such signs should not display a predominance of any of the accepted safety colours, viz., red, yesllow and green. The code does not purport to lay down when reflectorized signs should be used in preference to non-reflecting signs, although the latter should comply with all provisions of the code except Rule 5, Reflectorization.