A tractor driver is prohibited to carry a passenger, unless:

1. Correct answer: 3 months passed from the date he obtained the tractor driving license.
2. One year passed from the date he obtained the tractor driving license.
3. 6 months passed from the date he obtained the tractor driving license.
4. He successfully passed a theoretical examination based on the traffic point system.

WhyA tractor driver may not carry passengers for the first 3 months after getting the tractor license.