Driver Station size restriction?

[Invictus3593]

Is it illegal to make a driver station that is more than 12in deep? The only thing I've seen in the manual is this blurb right here:

Attached to the ALLIANCE WALL in each PLAYER STATION is an aluminum shelf to support the OPERATOR CONSOLE for the FRC Team in that PLAYER STATION. The support shelf measures 69 in. wide by 12 in. deep. There is a 54 in. long by 2 in. wide strip of hook-and-loop tape (“loop” side) along the center of the support shelf that may be used to secure the OPERATOR CONSOLE to the shelf.

But even then, this doesn't say anything about the size of the actual driver station, just the player station shelf.