Comparison of rugby league and rugby union 1 in league. A penalty goal is worth 3 points in union and 2 points in league. Use of a penalty box (or "sin bin") was introduced by rugby league in 1980. Rugby union had been experimenting with the same concept since 1979, although it was not formally sanctioned until 2001. Video referee technology was first used for rugby league in 1996 and for rugby union in 2001. In rugby league the ball may be thrown or knocked out of play deliberately, while in union those are penalty offences. Kicking the ball out of play is legal in both codes.
History of rugby union to 1890, games were won by goals scored. A goal was awarded for a successful conversion after a try, a drop goal or from a goal from mark. If the game was drawn, then unconverted tries were tallied to give a winner. This system led to score lines more akin to association football with far more games resulting in draws than are experienced in the modern game. One of the first tasks undertaken by the International Rugby Football Board, formed in 1886, was to introduce a standard point scoring system. One point was awarded for a try, two points for