I had a lady set up stall closeby today who was selling cider and calvados among other Brittanny specialities.I asked her about license requirements .If it is take away sales ,the licence is free and just requires you to go to your local Mairie and fill in a form.There is one form for beer and cider and a second form for spirits.She got registered at the tailend 2015 .
Anyway ,go to your local Hotel de Ville and ask.