When operator is drawing a vehicle, what condition must be met regarding safety chains?

When an operator is drawing a vehicle, it is crucial for safety chains to be attached. Safety chains serve as a critical backup in the event that the primary coupling (such as a hitch) fails. Their purpose is to prevent the trailer or towed vehicle from becoming detached while in transit, which could lead to significant accidents or hazards on the road.

By ensuring the safety chains are securely attached, the operator adds an essential layer of safety, helping to maintain control over the vehicle and protecting other road users. Proper positioning and securing of these chains is also important to ensure they do not drag on the ground or create a hazard themselves.

The other options present conditions that do not support safe towing practices. Disengaging all safety equipment or unlinking the chains compromises the safety net intended by these devices, and being exempt from using chains contradicts standard towing regulations and best practices.