A question on SHIPPING

[JJcos]

I tried to open a new thread in the "rules" but it wouldn't allow anymore "new threads" in that forum. So my question is regarding the shipping of "robots" - If a team builds more than 1 robot, is it within the rules to ship 1 of them to compete at say the "Ohio buckeye regional" and bring the other on the bus that they travel in and walk the 2nd into the "pits" the day of practice? And if that’s the case is it also "Legal" for "ANY TEAM" to show up at a Regional and "WALK THEIR ROBOT IN" to compete??? If these are within the rules then basically all teams have an extra 2 weeks to work on the robots before competing. I saw this last year time and time again and this year it was no different at the 1st regional we went to. Please can someone help me answer these questions as I am truly stumped?