Final answer:
The question addresses traffic laws specific to vehicle load extension and marking requirements for safety purposes.
Step-by-step explanation:
The subject of this question is related to traffic laws regarding the extension of loads on vehicles and the required safety markers. When loads extend to the rear of a vehicle, they must be marked to alert other road users.
The specific restrictions and marking requirements, such as distance limitations to the front, right, or rear of the vehicle and the type of markers used during day and night, are typically regulated by traffic laws which can vary by region or country.