[EricH]

Originally Posted by Short Stuff

When our team builds our bumpers do the tops of all the bumpers have to be at the same (or at least very similar) heights?

Please see Q199 and R22's blue box.

Longer answer: If a bumper section happened to be lower than the rest of the bumper sections, but the bumper was still level and entirely within the bumper zone, I can't see anything that would rule it illegal. However, if the bumper was angled, it would be illegal per R22 (blue box), clarified by Q199.