At a crash scene, an unconscious motorcyclist is not breathing normally and the helmet blocks airway access. What is the best first-aid principle?

1. Airway and breathing take priority; remove the helmet only if necessary for effective airway care or resuscitation, ideally with help and neck support
2. Never remove the helmet even if breathing is absent
3. Remove the helmet immediately in every crash for inspection
4. Wait for police paperwork before calling medical help