(8)The person in charge at the top of any haulage plane or incline shall ensure that the stop-blocks are blocking the way, before allowing any tub to be brought on to the top landing and shall cause the tubs to be securely coupled up to each other and to the rope or chain, before the stop block is opened. In case any alternative safety appliance is provided, he shall cause the same to be brought into use on every such occasion.
