IIRC, it's open to anyone who submitted by the deadline. Can't find the plain English clause right now, but the
official rules explain:
This Award Category (3D Design) will be judged in 2011 only at the Championship level. It will not be judged at the Regional level. The Winner will be announced by an Autodesk representative, and the winning entry will be shown during the 2011 FIRST Robotics Championship Awards Ceremony. Representatives from the winning team will be acknowledged on the main stage, if present.
You'll be notified by phone (see Section 7).