Please not that this is affiliated with the Spanish education authority. You are just trying
to cover yourselves after saying that private schools weren't regulated, when in fact,
they are!

The only real Educational Regulatory Body anywhere is a Statutory Body set up and governed by statute with statutory powers granted by the the laws passed in country's parliament. This means an official inspector has the powers to force statutory changes upon any school or even close it down.

Associations are different, they are clubs paid for by their members to form a unified front to act as lobbyists for their members interests in the event of something going wrong or some law not to the liking of their members.

By the Great Architect.... The image begining to form in my mind about these associations is a bit like the Freemasons.