Milan Fistonic has posted an article that appeared in the " Auckland University Car Club " magazine - written by Allan Grout. there is a comment that it was called a Sporting Trial, as clubs were testing the Rally Rules. I do remember Rod Peat suggesting that I enter in my 850cc standard Mini, as Roll Cages and Full Harness seat belts were not yet required. I didn't enter but went to help as a Marshall, which meant you did get to drive on some of the roads.
Thanks Milan for the post, I thought it is appropriate here :