Which of the following is a legal requirement for an LTO professional driver seeking to add DL Code CE (Heavy Articulated) to their license?

1. They must have held a valid Non-Professional Driver's License for 5 years
2. They must have held a valid Professional Driver's License for Code C or D for at least 6 months and pass a practical driving exam on an articulated vehicle
3. They must own the articulated vehicle used for the LTO driving test
4. They must possess a bachelor's degree in logistics or automotive engineering