Managers will be banned from commenting on referees before the match under rule changes announced by the Football Association.
Any manager who makes derogatory remarks about a match official before a game will face disciplinary action.
The FA said: “Clubs are being advised that any media comments by managers, players or any other club officials relating to appointed match officials prior to a fixture will no longer be allowed.
“Post-match comments in relation to match officials and incidents are still permitted provided they are not personal in their nature, imply bias or attack the integrity of the officials.”
Under other rule changes, clubs can now be charged if three or more players surround the referee in a “confrontational manner.”