The SFA have no such controls for Scottish football which has resulted in the Lanarkshire and Glasgow Referee Associations supplying most of the officials involved in top level matches with other areas virtually written off.
Tavpen and Penalty for Rangers have long been iconic on social media, that may need to be amended with two penalties per game becoming the norm. Or one and a spare with Tavernier not hitting the net as regularly as he once did from his favourite distance.
Muir, like McLean and assistant referee Frank Muir, had a clear view of the incident but neither of the three opted to apply the Laws of the Game.
Last season in Italy and now at Ibrox on European nights Dessers will know that if he wants to run into his own penalty box, lift his hands and strike the ball a penalty will be awarded. It happens to every team in football.
VAR was introduced last October with Celtic the first victims of the Plan B system with a clear penalty denied at Tynecastle when Michael Smith raised his hand to deflect a James Forrest pass.