Final answer:
The permit holder must pass a written test before practicing driving. A valid driver's license is not required for practice, and the minimum age is often below 18 years old.
Step-by-step explanation:
The correct statement is 2) The permit holder must pass a written test before practicing driving. The process of acquiring a driver's permit typically includes passing a written knowledge test to ensure understanding of traffic laws and safe driving practices. Regarding the age for practice driving, the minimum is often lower than 18, provided that the individual holds a learner's permit or provisional license. It is not required to possess a valid driver's license for practice, as the purpose of the permit is to allow for legal practice prior to obtaining a full license. Lastly, the vision test is indeed a requirement for driving, ensuring that permit holders have sufficient visual acuity for safe operation of a vehicle.