Prohibition on provision and display of hazard warning panels and labels and additional information
22.—(1) Subject to regulation 23(3), where a road tanker or a tank container—
(a)is being used solely for the carriage of any substance which is not a dangerous substance; or
(b)is empty,
the operator and driver of the road tanker or other vehicle carrying the tank container shall ensure that the road tanker or tank container concerned does not display and is not provided with any hazard warning panel or label.
(2) The operator and driver of a road tanker or of any other vehicle carrying a tank container shall ensure that nothing is displayed on the road tanker or tank container concerned which would be likely to confuse the emergency services if read in conjunction with any information—
(a)required to be displayed on that road tanker or tank container in accordance with regulations 18 to 20; or
(b)the display of which on that road tanker or tank container is necessary for the operation of any disapplication specified in regulation 21.