Following the Stellenbosch trial, the IRB are keen to take the experiment onto the next level.

With a target of introducing the laws to the whole sport in 2008, the experiment will continue in Scotland's Super Cup competition - for Premiership teams like Boroughmuir and Watsonians - from January next year.

"Ultimately, we want the game to be easier to play, coach, and referee - and easier for fans to watch," said O'Brien.