Under Article 30(j) of Ley 24.449, what retroreflective marking must passenger and cargo transport service vehicles carry?

1. No retroreflective marking is required for transport vehicles
2. Retroreflective bands (bandas retrorreflectivas) delimiting the lateral and rear perimeters of the vehicle
3. A single reflective white dot on the driver's door
4. Reflective paint covering only the roof