About Instructions from competent persons: who, and what rank: which statement is WRONG?

Only competent and recognisably identifiable officials, marechaussee, customs officers or traffic controllers are binding.
Road users must stop when an escort of a rail vehicle shows a stop signal with sign F10, a red flag or a red lamp — this competence is separate from the police.
Instructions take precedence over traffic signs and traffic rules, including a green traffic light.
✓ A traffic warden (verkeersbrigadier) may make you stop anywhere on the road, not just at a crossing point for children.

Correct answer: A traffic warden (verkeersbrigadier) may make you stop anywhere on the road, not just at a crossing point for children.

Explanation

Drivers must stop for the stop instruction of traffic wardens who help children cross — the competence is tied to that specific role, not general

Only competent and recognisably identifiable officials, marechaussee, customs officers or traffic controllers are binding
Road users must stop when an escort of a rail vehicle shows a stop signal with sign F10, a red flag or a red lamp — this competence is separate from the police
Instructions take precedence over traffic signs and traffic rules, including a green traffic light