Non high-priority vehicles in emergency service

Article 70. Non high-priority vehicles in emergency service.
1. If, as a result of specially serious circumstances, the driver of a non high-priority vehicle is required, without being able to resort to another means, to carry out a service normally reserved to high-priority vehicles, they must ensure that other users are aware of the special situation whilst travelling by means of using the horn intermittently and using the hazard lights, if available or waving a handkerchief or similar procedure.
2. Drivers referred to above must respect the traffic rules, above all at intersections, and other users of the road will abide by the arrangements in Article 69.
3. At any time, traffic officers may demand justification of the circumstances referred to in section 1.
4. Infractions of this Article are considered serious offences (LST Art 65.4.c).