I actually asked on our local FB here and this was the response I got. I thought it was quite interesting.
"If you do not need a flash, then make sure you use a bridle that does not have the loop for the flash on the noseband. You can easily snip the loop holder off of the noseband. A judge would frown on use of a bridle that had the loop and the flash not being used. So if you do not need a flash, then use a bridle that does not have the loop for it. Judges will not frown upon you if you do not use a flash and your horse does not need it."