Mounting / Orientation of cRIO

[Red_Snowman]

Our team (2491) is in the process of mounting our electronics, and we remember from last year that there was a rule that mandated that teams mount the cRIO in a vertical position (mounted on a "wall" as opposed to on the "floor" of the robot). We've checked this year, and there doesn't seem to be any rules about this particular issue. Can anyone tell me if there is a rule about it that we missed, and if not, are there any risks associated with not mounting it vertically (I seem to remember there being some problem with dust collecting on non-vertical cRIOs...)? Thanks!