IFAB has approved proposed trials whereby only the team captain may approach the referee and for sin bins to be tested at a higher level.
Hearts eke out a 1-0 win on Craig Levein's return to Tynecastle to make it three Scottish Premiership victories in a row for the first time in almost two years.
Three decisions have been deemed incorrect by the VAR Independent Review Panel following the first round of cinch Premiership fixtures this season.
St Johnstone moved off the foot of the cinch Premiership table with a priceless 1-0 victory over Ross County at McDiarmid Park.
Motherwell battled back from two goals down to draw 2-2 and deny Craig Levein a winning start with St Johnstone in the Scottish Premiership.
Managerless St Johnstone finally ended their wait for a first league win of the season as they secured a hard-fought 2-1 victory over Kilmarnock at McDiarmid Park