I had just watched a fantastic video about this very topic as it applies to the US https://www.youtube.com/watch?v=b5JbDuf--ng

Nice to see someone is keeping track of all of this in a logical way for all countries.

> Note: It has been decided not to add administrative boundaries of [super-national administrations] in OpenStreetMap. So please don't use admin_level=1.

Damn, I was hoping to see groups of countries (admin_level=1), and then groups of planets (admin_level=0), and then groups of stars (admin_level=-1), and then groups of galaxies (admin_level=-2). L. Ron Hubbard has surely established governments at all of these levels!