The start of the Scottish Premiership will see new rules come into force in Scottish football following use at the World Cup.
In the new league campaign, VAR will have the ability to review and overturn second yellow cards in instances of a clear and obvious error.
Previously, there was no route for VAR to assist the referee if a second yellow was wrongly issued, with the player then sent off as a result.
There will also be a crackdown on any time-wasting in an effort to speed up play and keep the ball active in matches.
As part of the initiative, there will be a ten-second timer for subs to leave the pitch when they are being replaced. Goal kicks and throw-ins will have to be taken within five seconds.
A new rule will see players who go down injured and require treatment have to leave the field of play for 60 seconds before they can return to the pitch.
Two significant World Cup initiatives have not been brought into Scottish football, though.
VAR will not review the award of corner kicks. At the World Cup, VAR could inform the referee if a corner was wrongly awarded so the decision could be changed.
And there will not be a red card punishment for players covering their mouths when speaking to opponents in Scotland.
Miguel Almiron had been sent off at the World Cup for Paraguay after covering his mouth when speaking to a Turkey player. Following a VAR check, Almiron was ordered off.
But that will not be the case in Scotland, with the mouth-covering rule not to be implemented.
