[EricH]

Originally Posted by EDesbiens

That's what I'm looking for... I want to know if someone from another team can join our drive team...

I introduce you to 2015's G32 (which I would count on being similar in text if not in number for 2016--it's one of THOSE rules), in full.

G32 During a MATCH, the ROBOT shall be operated solely by the DRIVERS and/or HUMAN PLAYERS of that Team.
VIOLATION: Offending ROBOT will be DISABLED.
Exceptions may be made before a MATCH for major conflicts, e.g. religious holidays, major testing, transportation issues, etc.

The basic thing to take away from that is that you're not supposed to have someone from another team on your drive team. The exception is to specifically allow certain problematic elements to not disrupt the team's event too much. Probably the biggest user of the exception is the teams from Israel who attend Champs.

I would not go into an event planning to have someone from another team on your drive team, unless you knew that a religious holiday or major testing was going to be a factor and was unavoidable. Especially with that "may" in there--that makes it clearly discretionary on the part of the event staff (though those folks are generally accommodating).