Rugby referees from the Northern and Southern Hemispheres have had differing interpretations of the laws of rugby union for more than a decade now.
The principal areas of difference have been to do with scrums—naturally—and at the breakdown, and it is not uncommon for Test matches to rest on whether the referee is from the North or the South.
Indeed, teams will tailor their approach specifically with the referee in mind.
Southern Hemisphere referees have diluted the value of the scrum over the last decade while their counterparts, quite rightly, have respected the traditional front-row battle that makes union so unique.
All the while the IRB has fudged the issue, until recently that is with the new engagement regulations.
Here we look at various areas of the game where refs from both hemisphere can get their collective heads together and finally officiate the game in the same way across the world.