Three papers published examine aspects of the Laws of the Game; Law 15 and the tackle with obligations of the tackled player in releasing the ball and for that player to immediately get to his/her feet, thus a ruck cannot take place. Law 20 and the scrum prohibits 'charging' at the set but expacts that the scrum is aligned parallel to the side line. Data shows that both the tackle and scrum take on average of 3 seconds to complete and that in sevens judgement skills are as important as decisions made that could potentially minimise error and prevent injury. i refer to the 2017 Laws of the Game, World Rugby.