http://www.fusil-calais.com/legal/legal_01_en.asp

According to the website above(thanks Ben) you need a shooting or hunting licence to possess a >10joule (7.4ftlb) air rifle in France, presumably you have one as you quote 12ftlb(16Joules)? - I thought hunting with an air rifle in France was a no-no, where do you obtain a shooting or hunting licence - what do you need to get one?

Richard