Under Article 54 of the Implementation Regulations of the PRC Road Traffic Safety Law, what are the statutory restrictions regarding cargo overhang and width expansion?

1. Cargo must not exceed the width of the vehicle body, and must not extend beyond the front or rear edges of the cargo bed without special permits and warning markings
2. Cargo may extend 3 meters past each side of the vehicle as long as daytime headlights are on
3. Cargo may overhang 5 meters behind the rear tailgate if a red ribbon is tied to one corner
4. Truck width restrictions do not apply if the freight is agricultural produce