yes
Yes, as long as it does not become involved in noise complaints.
on pre 1st august 1973 cars only
It's Helium.
Air France
16 is the legal drinking age in France.
It is illegal to use any type of horn that emits more than one tone, unless the tones are simultaneous. There are no exceptions. Emergency vehicles on route are an exception.
Air horns typically require a minimum of 60-120 PSI (pounds per square inch) of air pressure to produce a loud sound. The exact amount can vary depending on the specific air horn model.
Low tone air horns penetrate better through windows, fog etc. High tones are very noticeable but do not travel or penetrate well.
Air horns are legal in Queensland as long as they only play one note (musical air horns are illegal). The ADR rules state that they can't be on a fixed cycle, ie, you press your horn button and the horn makes continuous sound for a set time and then turns itself off. It must start with the press of the horn button and must stop when the horn button is released. Also your horn must play one single continuous note with the horn button depressed. Your horn can be powered by any means including air.
It is actually a German invention. I can't even think of a single manufacturer of so called French Horns in France. Most pro level horns are made in Germany such as the Hans Hoyer and Alexander brands, England where Paxman horns are made and the USA where CONN and Holton Horns are made.
Air France
This is legal for a man to marry his widow's sister in France.