"I'm not sure that it is good having three different bosses either. A referee has a home base, either a Northern Hemisphere or Southern Hemisphere boss and then an IRB boss. So if they have got three different ideas then you have got three different messages coming to you.
"Going back to the laws again... a lot of the laws are what you see and interpret."
The last game against the Springboks at Ellis Park was, arguably, the best produced in the professional age and Welsh referee Nigel Owens has been acknowledged as playing a significant role in helping that contest flow and pass off without incident.
The prospect of being given him - still rated as the best in the world - every game is not realistic, but Hansen would like to see an element of consistency in some regards.
"The [IRB] are trying to get ready for the World Cup so they have got to get the referees big games.
"I'd like to see them [IRB] employ the top 10 refs and get them to do all the games. That way they would become better and more consistent and give them two touch judges for the year and say, 'right that is your team for the year and we will judge you as a team'.
"I don't think referees make great touch judges, simply because as a ref you follow the ball.
"As a touch judge you have to keep an eye on the whole, the various other things. So one other thing I'd probably do as well as rip up the rule book... I'd do that."
The IRB won't be willing to make any significant changes to the rulebook or employment structure of referees until after the World Cup.
But Hansen has provided a framework for discussion and ideas his fellow coaches would agree are worth exploring.