"Therefore do not fight regulations, inquire if you are obligated to obey them, and who is going to administer them, and under what authority."

This is what you mean when you advise me to write an open letter to the person who makes the provision.

"There is only one form of authority, and that’s yours. For anyone to be able to force you to do something, you must first give them authority to do so."

I totally agree with that. Only here a totalitarian government does this "by violating someone's rights."

In any case, it is always good to know how to prepare a defense and above all, that in this summary shown, which was issued by the Central Bank of Cuba itself, based on the aforementioned law, it allows me to have the opportunity to use the "digital assets" between peers, without being a service provider. So I could pay another in BTC and this would not be illegal.