Scrum (rugby) the players who are designated forwards binding together in three rows. The scrum then 'engages' with the opposition team so that the players' heads are interlocked with those of the other side's front row. In rugby union the initiation of the process is verbally coordinated by the referee who calls 'crouch, bind, set' as of 2013 (formerly 'crouch, touch, pause, engage', 'crouch and hold, engage' before 2007). The scrum-half from the team that did not infringe then throws the ball into the tunnel created in the space between the two sets of front rowers' legs. Both teams may then try
Referee (still commonly called club linesmen) to assist the neutral referee appointed by the governing football association if one or both assistant referees are not provided. In this case, the role of the linesmen is limited to indicating out of play and cannot decide off side. An umpire is an official in the sport of Australian rules football. Games are overseen by one to three field umpires, two to four boundary umpires, and two goal umpires. A game of bandy is officiated by a referee, the authority and enforcer of the rules, whose decisions are final. The referee may be assisted