[raverbashing]

These are all valid considerations, but I think you're overestimating the level of equivalent judicial the USSC has for example

> wouldn't it be extremely prudent to parameterize what exactly those authorities are?

TFEU

The ECJ decisions are actually more like recommendations on how the local courts should act.

Countries that don't follow the rulings can't complain if they're suspended from EU resources and mechanisms while that is not solved, like having their exports blocked, be removed from Schengen, etc. (And if they don't like it they're free to complain to the walls since they don't recognize the ECJ...)

[jollybean]

That's not it though.

ECJ rulings are the law of the land as far as they see it, not a 'recommendation'.

There are no rules around sanctions etc. for countries that don't 'comply'.

It's just 'make it up as they go along'.

The problem is: there is no treaty basis for ECJ Supremacy. By opening that can of worms, the EU may find themselves with a 'big losing hand' and more affirmatively lose their power.

As I pointed out in the previous comments, the issue is unsettled even in Germany.