BBB, Why don't you directly ask to the DGAC (French Civil Aviation ? )
I would tipically ask a couple of Yes or No question like :
-Does the 60 years Old rule apply to a professionnal pilot involved in private operations ?
-Is my job considered Private transportation (give a SHORT description, keep it simple, ) ?
Then, try to get a fax or a letter, with a name & signature and Keep it with your licence.
here
If some of you are interested, I will try to speak directly with the licensing personnel (in French ) and sort out the case precisely for non-airline pilots
If you have a more specific question, send me a PM, I will translate it for you to the authorities (They don't speak english there
)
Cheers