Jefferies works on the principle that referees should be determined to do their best no matter what level of rugby they are controlling.
"At the end of the day a grand final is just another game of footy, the rulings you make there are no different than you'd make for a lower-grade match," he said. "It is a bigger occasion but rules are rules, you apply them the best you can, it's the same in every game."
Jefferies is expecting a closely contested Tui Cup final between Eketahuna and Gladstone on Saturday but he knows only too well such predictions can be well astray if one of the sides fails to front up on the big day.
"We've had a couple of finals in recent times where the winning margin was a lot bigger than most people anticipated. You can never be too sure how teams will respond when so much is at stake."
As to the future, Jefferies has no definite plans to ease back on his refereeing appointments but admits the days of him controlling finals may be coming to an end simply because of the number of younger referees in Wairarapa-Bush who are showing considerable promise, people such as Alistair Payne, Shay O'Gorman and Scott Andrew.
"We're very fortunate with the calibre of the younger guys coming through, refereeing is in really good hands here," he said.