Rule 9 – Section 3 – Article 3 – Holding and Use of Hands or Arms: Offense

a. Use of hands
A teammate of a ball carrier or a forward passer legally may block with his shoulders, his hands, the outer surface of his arms or any other part of his body under the following provisions.

1. The hand(s) shall be:

(c) At or below the shoulder(s) of the blocker and the opponent (Exception: When the opponent squats, ducks or submarines).