The referee shall:

  enforces the Laws of the Game
  allow play to continue if the team against which an offence has been     committed stands to benefi t from such an advantage, and penalise the     original offence if the anticipated advantage does not ensue
  take note of and report to the appropriate authorities any incidents
    occurring before, during and after the match and any disciplinary     measures taken against players or team offi cials
  act as a timekeeper in the event that this offi cial is not present
  stop, suspend or terminate the match for any infringement of the Laws of     the Game when he considers it appropriate
  stop, suspend or terminate the match as a result of any kind of outside     interference
  take disciplinary action against players guilty of cautionable and
    sending-off offences
  take action against team offi cials who are guilty of misconduct and,
    if necessary, dismiss them from the pitch and surrounding area
  ensure that no unauthorised persons enter the pitch
  stop the match if, in his opinion, a player is seriously injured and ensure     that this player is removed from the pitch