Well, the problem is Caron have been reformulating for a number of years now.
I have Nuit de Noel and the box just says fragrance, water and alcohol, but it is only 8 years old I know. I bought a new bottle on ebay for a steal with the full list of ingredients which does include oakmoss marked clearly. It smells the same as the original 8 year old bottle I own.
The Carons which Turin talks about being perfect are going back to the 60's and older even. He really lays into Caron as a brand for anything younger than this. He disses(sp) some of the urns I love which have not been reformulated as far as I know. Infact Alpona is now discontinued but was gorgeous even not vintage. I get the feeling he just does not like Caron as a brand.
Another problem with Caron is they are not on the date sites which you can check when a bottle came out by the code number.
Caron changing formulas is nothing really to do with the IFRA but the house themselves deciding to change and perhaps using cheaper ingredients.
Oh I do own a 1960 bottle of Fleurs de Rocaille extract, it was sealed and the top notes are fainting but the dry down is fabulous.