How should other vehicles be warned at night about a vehicle carrying a load extending more than 1.5 meters?

• A red flag should be attached to the end of the extension or load.
• A blue flag should be attached to the end of the extension or load.
• A blue light must be attached to the end of the extension or load.
• A red light must be attached to the end of the extension or load.
  Explanation:

  "At night, a red light must be attached to the end of any load extending more than 1.5 meters beyond the vehicle. This ensures the extension is clearly visible to other drivers, promoting safety on the road. During daylight hours, a red flag is used instead."