Can you put this in your own words in a really detailed paragraph Referee:

Most senior official

Ensures that the competition is conducted with the relevant laws and regulations

If an umpire is unsure of a decision they may clarify with the referee

The referee has the final say on decisions they are dealing with

The referee has the power to disqualify a player

The referee is responsible for the appointment of match officials, ensuring they have the necessary qualifications

They may have a deputy referee to support