The way I understand it is that it is not a ban, but that if a company uses one of the allergens they must list it on the packaging. Chanel, for instance, still uses oakmoss in many of their formulations and you can see it listed. The reformulated version of Monsieur Givenchy still uses oakmoss and it is listed. There are many other such examples. Some companies chose to not list the materials and instead reformulated their fragrances to avoid using them.