Answered: V5 Legality for VRC In the Zone

Are teams that have been invited to the V5 beta allowed to use V5 components, such as the V5 Robot Brain, Smart Motors, or other new sensors on their VRC robot?

No. V5 components are not legal in the 2017-2018 season. The V5 Robot Brain is not considered a legal VEX EDR Microcontroller for VRC In the Zone.