The following commercial vehicles must carry approved warning devices, such as flags, flares, fusees or reflectors: (a) all vehicles with a seating capacity of more than 10 passengers, (b) all commercial vehicles with an overall width of more than 2.3 meters, and (c) all commercial vehicles with a load width of more than 2.3 metres. When parked in the dark, these commercial vehicles must have a minimum of two warning devices.