wear any sort of protection or armour. The two rugby codes differ as the result of changes made to the rules of rugby league. League implemented these changes with the aim of making a faster-paced and more try-oriented game than rugby union. The main differences between the two games, besides league having teams of 13 players and union of 15, involve the tackle and its aftermath: Union players contest possession following the tackle: depending on the situation, either a ruck or a maul can occur. League players may not contest possession after making a tackle: play is continued with a play-the-ball. In league, if the team in possession fails to score before a set of six tackles, it surrenders possession. Union has no six-tackle rule; a team can keep the ball for an unlimited number of tackles before scoring as long as it maintains possession and does not commit an offence. Set pieces of the union code include the scrum and the line-out. The scrum occurs after a minor infringement of the rules (most often a knock-on, when a player knocks the ball forward). After an infringement, packs of opposing players "scrum" or push against each other for possession. In a line-out, parallel lines of players from each team, arranged perpendicular to the touch-line, attempt to catch the ball thrown from touch. A rule has been added to line-outs which allows the jumper to be pulled down once a players' feet are on the ground. In the league code, the scrum still exists albeit with greatly reduced importance. In league, the scrum involves fewer players and is rarely contested. Set pieces are generally started from the play-the-ball situation. Many of the rugby league positions have names and requirements similar to rugby union positions. Notably, however, there are no flankers in rugby league. Culture Home countries In England, rugby union is widely regarded as an "establishment" sport, played mostly by members of the upper and middle classes. For example, many pupils at public schools and grammar schools play rugby union, although the game (which had a long history of being played at state schools until the 1980s) is becoming increasingly popular in comprehensive schools. Despite this stereotype, the game, particularly in the West Country is popular amongst all classes. In contrast, rugby league has traditionally been seen as a working-class pursuit. Another exception to rugby union's upper-class stereotype is in Wales,