Cheesy decision from the ECJ

Bloomberg reports that the ECJ has ruled that "Only cheeses bearing the protected designation of origin 'Parmigiano Reggiano' can be sold under the name 'Parmesan'". However, it has also stated that it is for Italy (the home country of the registration) and Germany to take action to ensure that no one else uses the name.

The IPKat is intrigued. How can Italy take action where the infringement is in Germany? More to follow when the actual decision comes out.