I am not sure that is a reason the club will win, and I will just add that all the "royal" families inter-marry, so it will be nearly impossible to find a company in AD that isn't associated to Mansour, if not directly then by marriage.
It is no coincidence the PL rules include this:
View attachment 126737
It is absolutely clear where these rules are targeted, and just to make sure:
View attachment 126739
It really couldn't be targeted any more blatantly, so I am pretty sure there is a good case that the definition is discriminatory (and has been drawn up for the benefit of certain other clubs) and the rules themselves are unnecessary and onerous, but whether that makes the whole thing illegal under competition law, I wouldn't like to say.
It should be, imho, but is it?