 The main responsibilities of the tournament director are to adjudicate on disputes and irregularities that occur during the tournament and to control the movement.Through the 1930s, the "Laws" were promulgated by the Portland Club of London and the Whist Club of New York.From the 1940s onwards, their roles were supplemented by British Bridge League and European Bridge League on the European side, and American Contract Bridge League Laws Commission from the American side.