UCI rules on allowed brakes?
this is Nick the owner of TriRig and the designer of the brake. 

Short answer: yes, Omega X has been allowed to race in all stripes of UCI events, up to and including multiple appearances in the Tour de France. 

So generally, it appears it has been ruled legal. Of course, there is some level of unpredictability in how any given commissaire will rule on any given day at any given event. We have heard a couple rogue reports of the commissaire requiring the Front Plate to be removed. But in general, you should not have a problem. Thanks!