Portable warning sign to be carried by heavy motor vehicle
33.—(1)  No person shall drive or cause to be driven on a road a heavy motor vehicle unless there is carried on that vehicle a portable warning sign of a type approved by the Minister.
(2)  Where a heavy motor vehicle is broken down or disabled and is standing on a road, the driver or person in charge of the vehicle shall forthwith place or cause to be placed on the road at a distance of not less than 20 metres from the rear of the vehicle the portable warning sign referred to in paragraph (1) so as to give a warning of danger visible to drivers of other vehicles on that road.
(3)  In this rule, “heavy motor vehicle” means a motor vehicle whose weight of which unladen exceeds 2,500 kg.