sing the diagonal system of control. The more senior of the two assistants will normally occupy the

 to position themselves quickly and easily to observe the important aspects of play (offside, ball in or out of play, goal-scoring opportunities, challenges for the ball) from multiple angles with multiple sets of eyes. Jump to: navigation, searchAustrian assistant referee Clemens Schüttengruber signalling an offside offence has taken placeIn association football, an assistant referee is one of several officials who assist the referee in controlling a match. Two officials, traditionally known as linesmen (or lineswomen if they are female),...

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al (if present) in notifying the centre referee that a substitution is being requested.

Assistant referees (linesmen) were formerly called linesmen. In 1996, the name was changed, primarily to better reflect the modern role of these officials, and secondarily to become non-gender specific. They are also sometimes incorrectly referred to as "referee's assistants". However the term "linesman" is still commonly used.Law 6 of the Laws of the Game outlines the general duties of the assistant referees, however their duties in a given game remain subject to the decision of the referee. These duties usually include indicating:   ...

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iemenslandt in honour of Anthony van Diemen, the Governor-General of the Dutch East Indies w

. Most initially opted for the right-wing diagonal although over the years the left-wing diagonal became increasingly popular and the preferred choice of most referees by the early 2000s. From 2007–08 the left-wing diagonal has been mandatory in English professional football although some referees at lower levels still use the opposite approach.Its implementation as a standard practice for referees is attributed to Sir Stanley Rous, former referee and President of FIFA from 1961 to 1974.[12]For other uses, see Van Diemen (disambiguation).Van Diemen's...

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