Concept:Traffic rules describe safe and unsafe practices for road users.
Explanation:A valid driver's licence must be obtained before driving, so Option A is correct.
Flowing garments are unsafe on a motorcycle or bicycle because they can get caught in moving parts, so Option B is not correct.
Headlights must be used during unfavourable weather for visibility, so Option C is correct.
Drivers must not perform distracting activities while driving, so Option D is correct.
The question asks for the statement that is not correct.
Therefore, the incorrect statement is the one that permits flowing garments on a motorcycle or bicycle.
Answer:B. flowing garment can be worn on a motorcycle or bicycle