You mean "what Does" 1. He Refs the game :)
In competition table tennis, there is no such thing as "rules of tournament referee". However, you can go to the usatt.org website and research official rules of table tennis.
The player that is why it is called a gentelmens sport.
They are the referee and the umpire. A referee (or assistant referee) decides the application of the game rules, while an umpire (or assistant umpire) rules on the play or scoring in a game, including decisions on points scored.
An Umpire :)