6.A.4 THE DUTIES OF THE REFEREE IN THE PLAYING ENCLOSURE

(a) The referee is the sole judge of fact and of Law during a match. The referee must apply fairly all the Laws of the Game in every match.
(b) The referee keeps the time.
(c) The referee keeps the score.
(d) The referee gives permission to the players to leave the playing area.
(e) The referee gives permission to the replacements or substitutes to enter the playing area.
(f) The referee gives permission to the team doctors or medically trained persons or their assistants to enter the playing area, as and when permitted by the Law.
(g) The referee gives permission to each of the coaches to enter the playing area at half-time to attend to their teams during the interval.