Under the Provisions on the Administration of Road Dangerous Goods Transport (MOT Order 2013 No. 2, as amended), which of the following is a mandatory legal prerequisite for an individual applying to take the qualification examination for a Road Dangerous Goods Transport Driver (道路危险货物运输驾驶员)?

1. Holding a corresponding motor vehicle driver's license for at least 3 years, with no major or fatal traffic accident with full or primary responsibility within the past 3 years
2. Holding any passenger car license for at least 6 months with no parking tickets
3. Completing a 4-year university undergraduate degree in chemical engineering
4. Owning at least five personal commercial tanker trucks