Because they have a website and they make the rules, it's not a law. The west Balkans and Belarus are also part of Europe but in none of the unions, association

Because they have a website and they make the rules, it's not a law. The west Balkans and Belarus are also part of Europe but in none of the unions, associations, etc. mentioned so the domain is misleading too. It's not european, it's "those unions we like".