The possessive form of the noun referee is referee's.
Depending on the level of competition but I shall assume the highest level, there are 5.In international/super 14 rugby for example there is the referee that blows the game on the field. He is supported on either touch line by one Touch Judge (TJ). There are therefore 2 TJs. They help the referee with line out positions, off side calls, foul play calls, conversion/penalty kicks/drop goals, and other general matters is assistance to the referee and on their recommendation to the referee penalize the offenders accordingly.TJ1 is the first reserve in case of an injury to the referee and TJ2 is the second reserve. TJ3 would be a reserve to TJ2 (but not running touch) rather tending to any side line activities such as "blood replacements" and substitutions.Lastly there is the Telly Match Official (TMO). The referee will call a "time out" and request that the TMO give judgment over the awarding, or not, of a try.In a rugby match there is the 1 main referee and 2 touch judges.Today, in Rugby League there are two main referees on the field, two touch judges and one video ref
The 2nd referee assists the 1st referee.
the judges assist the referee.
a referee jersey
The plural of referee is referees.
An assist referee should know all about football. He should know as much as the referee so that if the referee is blinded or very far away the assistanat referee could give decession after consulting with the referee.
The umpire assists the referee.