The only thing wrong with is the enforcement, at which point do you value sovereignty over common market ? (Everyone should still implement this of course.) B

The only thing wrong with is the enforcement, at which point do you value sovereignty over common market ? (Everyone should still implement this of course.) But having the ability to say no is still nice. About the models, well normally most countries will apply the rule anyway, as such the vacuum cleaners you will be able to get will conform anyway. (And the vacuum cleaners was an example.) Bus as stated it's mainly about sovereignty versus unity. Also I am not sure if optional parts would help keep the EU together: on one side you feel less forced, and more invested. On the other side it diminishes to effectiveness of it. And I think I mainly fear the EU becoming the the USA. I do not think many people in the EU are keen on seeing that happen.