To clear up the issue on medical certificates a little bit as there is a whole load of confusion and some assertions that are just plain wrong....I have been working as a PADI dive professional in the South of France for ten years now, also have the obligatory French govt instructor qualification, the Brevet d'Etat.
Some operators will insist on a medical even for fun dives, but it is NOT a legal requirement. It is part of the FFESSM regulations. We do not insist on a medical for fun diving particularly given that many examinations involve a Doctor lightening your wallet to the tune of around 25 for a cursory inspection. We do insist on a medical certificate for all training courses. Obviously if any diver has the slightest concern over their fitness to dive it is the responsible thing to do to go and get yourself checked out by a good diving doctor.
---------- Post added August 5th, 2013 at 09:30 PM ----------
and for Peter C....you will normally find that French tanks are both, with the removal of an insert with an allen key enabling conversion from yoke to DIN...