[TubaMorg]

Yes, as Al says, it is a rule so build accordingly. Keep in mind that the flag poles are very flexible. I would be impressed if they broke without being mechanically caught in something. They will certainly survive impacts with the ball. The weak link will be how teams implement the flag holder. Protect the lap counter and associated wiring, allow it to always be clear from above, and don't let flag impacts dislodge the flag.