The V5 Brain inspection checklist, among other things, contains a check for:
"Robot Brain has the latest firmware listed on VEX.com/firmware"
This, unlike the rest of the checks, isn't backed by any official game manual rule.
Is it just a reminder for the teams or an actual requirement for tournaments?
If the latter, I would strongly oppose such a rule.
With all respect, I don't trust VEX enough to update in a week before a tournament. What if VEX releases on Friday?
What if the new firmware is broken like the recent Vex IQ release (people reporting port 12 no longer working)?