What is the mandatory safety rule regarding smoking and open flames near a vehicle carrying flammable dangerous goods (Class 3 or Class 2.1) in Argentina?

1. Smoking is permitted inside the cab with windows closed
2. Smoking, lighting matches, using open flames, or operating unshielded electrical switches is strictly prohibited inside the cab and within a minimum perimeter of 25 meters around the vehicle
3. Smoking is permitted during unloading if wearing leather gloves
4. Open flames are allowed as long as an extinguisher is held in hand