Willie Collum has backed match officials in the latest Scottish Football VAR Review Show in the wake of criticism of dismissals for denying obvious goalscoring opportunities.
The Scottish Football Association head of referees thinks it was correct to upgrade yellow cards for Celtic defender Auston Trusty and Falkirk centre-back Liam Henderson.
Dundee United's Iurie Iovu and Motherwell pair Oscar Priestman Liam Gordon were sent off this week for similar offences after the show was filmed.
Trusty was sent off in a 2-2 draw at Hearts for a foul on Pierre-Landry Kabore, having been in a "fairly central" position, according to referee Steven McLean, while Lewis Neilson was deemed too far away to catch Dundee United forward Max Watters, who was brought down near halfway by Henderson.
Collum felt the consistency in the Trusty and Henderson decisions was correct but also backed the decision not to issue the same punishment to Rangers captain James Tavernier, who was on a booking when he tangled with Kilmarnock striker Tyreece John-Jules.
Referee David Dickinson said there was "minimal contact" in the immediate aftermath and the VAR team did not intervene.
"What I would say is different from the previous clip (Trusty against Hearts) is the ball is in the air," said Collum. "There really is quite a bit of debate about whether the Kilmarnock player would have reached the ball before it went through to the goalkeeper.
"What I will say is the KMI panel felt unanimously that this was a foul and this would have been a second yellow card for James Tavernier. What we don't have here is an opportunity for VAR to be involved there because it's not a clear and obvious goalscoring opportunity."
Collum supported officials in every other incident shown, including red cards for St Mirren attacker Jake Young and Dundee United winger Amar Fatah.