I am event partner and had an adult coach ask me the following question:
Is it legal for a junior high student to compete in VEX IQ and VRC during the same season? I said to my knowledge that was legal and that the only rule I was aware of was that they could not be a driver for multiple teams at the same competition. In this particular case, three junior high students participated in a VEX IQ competition that was three weeks prior to the VRC competition. Personally, I was impressed that they built robots for both competitions.