by which different jurisdictions could have an overall collaborative framework and experiment with different approaches Is that like different countries inside

by which different jurisdictions could have an overall collaborative framework and experiment with different approaches Is that like different countries inside the EU implementing their own laws and drawing from that experience to influence the shape of EU laws? Or how neighbouring countries (like DACH, Benelux, Scandinavia or the Iberian peninsula) use regular international cooperation to shape cluster-local policies without involving the entire Union? No, we don't have any of that here.