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Signalling in roads.
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47.—Where rope haulage apparatus or a conveyor is installed in a road in a mine or is so installed as to permit of its operation in a road, then, if the length of road through which vehicles can move as part of that apparatus, or through which loads can be carried by means of that conveyor, exceeds ninety feet, there shall be provided and maintained effective means of transmitting signals from every point throughout that length of road, to the place at which the apparatus or conveyor is operated.
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