Geez the Canadian Assoc sounds as bad as the Australia one! Change rules to suit a couple of people who has some weight to pull, and give the rest of us piss poor answers.
Have they allowed you to warm up in a double bridle under medium level over there?
We're now allowed to warm up for any level test including a prep, in a double - and hey guess what - that' for safety reasons too, because some horse's aren't controllable in a snaffle.
Why not give it all in, stuff tradition. Lets ride in tie downs, gigantic western style spurs with double bridles and draw reins, fully booted, tongue ties - why not just tape mouths shut to stop tongues coming out?