When one motor vehicle tows another on a Zimbabwean road, which set of legal limits applies under the Road Traffic (Construction, Equipment and Use) Regulations, 2015?

1. The space between the vehicles must not exceed 4 metres, the towed vehicle must not be loaded and must not be heavier (net mass) than the towing vehicle, and the combination must not exceed 30 km/h unless connected by a rigid tow bar or draw bar
2. The space between the vehicles must not exceed 10 metres, and any speed up to the normal road limit is permitted
3. There are no distance or speed restrictions provided the hazard warning lamps of both vehicles are switched on
4. Towing is permitted only between sunrise and sunset, and only on tarred roads