The operator of an old tank-vehicle, old tank wagon or tank-container engaged in the carriage of dangerous goods by road or by rail shall take such steps as it is reasonable for them to take to ensure that nothing in the manner in which the old tank of the tank-vehicle, old tank wagon or tank-container in question is used is liable to create a significant risk or significantly increase any existing risk to the health or safety of any person.

Without prejudice to sub-paragraph (1), the operator of an old tank-vehicle, old tank wagon or tank-container engaged in the carriage of dangerous goods by road or by rail shall ensure that the old tank in question is not filled with dangerous goods beyond a safe level.