The key rule changes introduced for 2011 are: -Â Â Defenders will be rewarded for making a good 'legs' tackle, with referees allowing them more time. They will also be allowed, within reason, to spin on top if they are the lone defender in order to get to marker; -Â Â Dominant tackles will only be called if dominance is gained upon impact. Gang tackles will not be called dominant; -Â Â A penalty will only be awarded against a leg pull if it directly affects the speed of the play-the-ball; -Â Â The attacking player must play the ball on the mark and will be penalised if he takes steps either forward or to the side; -Â Â Defenders will only be penalised for making contact with the kicker if contact is deemed unnecessary; -Â Â Any player that takes a kick-off or drop-out in front of the line by any margin will be penalised; -Â Â Tries will be awarded if decoy runners have no effect on the try being scored; -Â Â Scrums must bind correctly and players must not break until the referee calls 'out'. Players will be penalised if they break early; and -Â Â The 10-metre advantage rule has been scrapped, with referees to determine when a side has taken their advantage. There have also been changes in the video referee's room, with Bernard Sutton moving upstairs as a result of ongoing knee problems and Paul Mellor and Rod Lawrence both video ref trainees.