 A jumping player cannot be tackled until they stand and only shoulder-to-shoulder contact is allowed; deliberate infringement of this law is dangerous play, and results in a penalty kick.A scrum is a way of restarting the game safely and fairly after a minor infringement.It is awarded when the ball has been knocked or passed forward, if a player takes the ball over their own try line and puts the ball down, when a player is accidentally offside or when the ball is trapped in a ruck or maul with no realistic chance of being retrieved.