Championship clubs have been warned that sanctions for breaching Financial Fair Play requirements could be as severe as being docked 21 points.
The new guidelines came into place following an EFL meeting on Thursday and will see the current 12-point deduction increased to 21 points if a breach is seen as ‘aggravated’.
Sheffield Wednesday and Birmingham City are among the clubs that suffered from transfer embargos over the summer because they had broken FFP rules.
The sanctions might not end there for the Blues however, as the Times report that they are facing a 15 point deduction for signing Kristian Pedersen.
An EFL spokesperson said: "The EFL presented to Championship clubs the sporting sanction its board would be seeking against any club found to be in breach of its profitability and sustainability rules.
"This included a points deduction, with reductions available dependent on the level of the breach. Aggravating factors will also be taken into consideration, resulting in potential further punishment.
"Any final sanction will remain a matter for an independent disciplinary commission to determine, who have a full range of penalties available to them.
"Clubs found to be in breach and referred to a commission will be given the opportunity to put forward their case in mitigation."