Case Book 9.4.3(b)

[timasdf]

Originally Posted by FMadera

Not just the hands, but any body part. Head above the net and hands below still would constitute a blocker if all other requirements were present.

This is certainly correct. However, I have never seen, nor do I believe any of us have ever seen (nor ever will see), a BRB violation caused by a player with only a body part other than hands/arms above the top of the net.