Dear Andrea
The '5% vol.' would be applicable across the EU. In fact, since the importer information is not required since the producer information is also on the label, you may wish to take the opportunity to rationalise labels for Europe. This has become slightly more difficult with ingredients listing coming into play but dual language label etc is also feasible.
This may assist dry material costs and improve production efficiency if you are then able to do the orders for a couple of EU customers at the same time.
Hope this is of assistance.
Kind regards
Barbara