[magicalhippo]

> I am genuinely curious about what that agreement contains and how well it was respected in the past.

Easy enough to find[1]. Here[2] is a nice article which digs a bit deeper into how it might play out.

[1]: https://eur-lex.europa.eu/EN/legal-content/glossary/mutual-d... (links to the treaty section if you want the text verbatim)

[2]: https://www.politico.eu/article/5-things-to-know-about-the-e...