Belgium does not have an overseas airline, since the demise of Sabena. As such, they have less incentive to restrict onward authority of third party carriers. The EU recently got on their case for allowing Ryanair to fly to Charlerois, a little used airport near Brussels, but also convenient to much of France. As an aside, David Bonderman, who has had long involvement with CO, also serves as Chairman of Ryanair, even though it is nominally an Irish carrier.