Practice sessions?

[dave_l]

I've looked through the rules and team updates, and can't find any description of how the practice sessions are structured.

For example, does each team get a chunk of time with exclusive access to the field? Or is it shared field time? (And if so, with whom?) Does it include auton mode time? What level of control do the teams have during practice? (For example, can they run through multiple auton scenarios during a practice session? Do they have ability to manually enable/disable auton mode?) Can the human players run through their part multiple times? Will the team be able to stop a practice session, enter the playing field to make robot adjustments, then resume practice?

Is practice structured the same at all regionals, (we'll be at Cleveland), or does it vary from regional to regional (based upon number of participants, etc)?