Yes, UEFA are complying with EU rules, no one is saying the opposite. In fact, that's exactly what I'm arguing. You seem to be denying that they have to comply with EU rules (within reason, as I said there is elasticity for sporting competitions). Of course UEFA are able to determine the entry criteria as they see fit, the point is any decision would be open to legal challenge which you seem to think is not the case, as UEFA do have to comply with a wider body of guidelines and regulations. Otherwise, to use an extreme example, they could only invite leagues/clubs who field white European players if they wanted. Yeah, they could do that, but they'd get annihilated in court.