Holding is defined as the use of the hands and/or arms to grasp or encircle an opponent. It is illegal at all times, except when a player tackles the ball carrier. Holding hands and locking arms during a scrimmage is prohibited.
It shall be illegal to touch the kicker when in the act of kicking from scrimmage, subject to the following conditions:
It shall be illegal for a player to use the body of another player or the goal post assembly in any way to gain elevation in an attempt to block a field goal or a convert attempt.
After a change in possession during a play, or the recovery of a kicked ball by either team, a player of the team in possession shall not be permitted to contact an opponent below the waist in any manner whatsoever.
During any play, a player of the team in possession shall not be permitted to contact an opponent from behind in a manner that interferes with the opponent's approach to the ball carrier.
A player shall not use a leg below the knee to hinder the progress of an opponent.
It shall be illegal to assist the forward progress of a ball carrier by providing impetus from behind or in front of the ball carrier.