Meanwhile our governement has said it's not allowed to do this because it would need to be done at the EU level due to "market harmonisation rules" or some nonsense like that. Looks like they're full of shit, given that Belgium managed to do it...
This is (almost) always an excuse. The almost being if legislation is being prepared. There are so much examples of these kind of differences in neighboring countries, mainly alcohol and firework rules come to mind.
It would be really helpful to know what government you are referring to.