PAVO Refschool Practice Test

[pavbref]

Was studying for the upcoming tests, and came upon the following question:

The libero for team S, while in the front zone, jumps to attack the ball that is partially below the top of the net. The ball falls to the floor on team R side.

Correct answer is PtR.

reference is rule 12.1.2.1

Why is this an illegal libero hit? The ball is not entirely above the top of the net.

The rule states:

The libero is restricted to perform as a back-row player and is not allowed to complete an attack hit from anywhere (including the playing court and free zone) if, at the moment of contact, the ball is entirely above the top of the net.