The SFA have apppointed Stuart Dougal to be in charge of Saturday's game at Ibrox.
His most famous/infamous appearance in this fixture was in August 2006 when Alan Thompson was sent off in a 3-1 win for Rangers.
After the game came the real aggro with Neil Lennon shown a red-card after squaring up to Dougal and a linesman.
Lennon was almost thrown out of Scottish football after trial by 'meeja' but after an appeal to the SFA backed by SPFA rep Fraser Wishart the ban was reduced to two games.
Dougal, who had a legal representative at the appeal, was far from happy running off to the newspapers about the injustice of it all.
Whoever was appointed was going to be under scrutiny. Last time at Ibrox Celtic had nine players booked whilst amazingly Rangers haven't had a single booking in their last five SPL fixtures.
The eyes of the Celtic support will be closely on Dougal on Saturday but other than that performance at Ibrox two years ago I don't think that there has been too many issues with him in these fixtures.