The rule is simple. EU directives must be implemented in national laws of all EU member states. If Poland fails to implement the directive by such an action a EU violation case would start ultimately leading to consequences.
OTOH this is a tested way to get stuff in laws that are hard to find national support for. Make it an EU directive and explain to your people that "Sorry, but even if we don't like it, we must implement this now." - see EU data retention directive etc.
OTOH this is a tested way to get stuff in laws that are hard to find national support for. Make it an EU directive and explain to your people that "Sorry, but even if we don't like it, we must implement this now." - see EU data retention directive etc.