Transfer rules back in the spotlight after Diarra case

(Reuters) - Football's transfer system is back in focus over a clause in FIFA's regulations that the players' union said would not be accepted in any other profession and which a Belgian court suggested could contravene European labour law.

The international transfer system, which processes hundreds of millions of dollars each year in player sales and has existed in its current form since 2001, is overseen by FIFA, soccer's world governing body.