I heard someone related to the Paris office raid comment when that happened. She was saying that multinational corporations always say that their organization and tax schemes are legal but that in reality it's so complex and spread in multiple countries that nobody really knows for sure and so it's only legal by default.
Isn't that true for almost everything though? The laws are so complex that no normal citizen can understand them. Even lawyers seem to disagree now and then.
But obviously most ownership is a simple two node thing with a single directed edge connecting the nodes. These are simple to decide if they are legal.