Players line up either as a forward or a back. Forwards are the players who take part in the scrums and lineouts, backs can be seen lined up when the ball is passed along the line.
Although their motion will generally be forward, players cannot pass the ball forward, i.e. towards the oppositions try line. Referees will stop the play if the ball is passed forward and award a scrum (Unless there is an advantage – see advantage section. A scrum will also be called if a knock on occurs with the “head” (see the scrum section) going to the non-penalized team. A knock on is where a player loses control of the ball and propels it forward with their hands or arms into another player or into the ground. If it is propelled forward and the player retains control with out it hitting the ground or another player, then it is play on. There is however an exception to this rule, if a kick is charged down, the knock on rule is not applied.
